Question about 1999 Chevrolet Silverado 1500

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Battery light is on 1999 chevy silverado

I have replaced the battery and the alternator the ligtht still comes on but my voltage meter says it on or around 15-16 volts

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SOURCE: location of wiper motor 1999 chevy silverado

under hood drivers side on fire wall between engine and brake master cylinder take off wiper arms slide tab at bottom lift off -- un- screw cowl the cowl is in 3 parts -unscrew center with hood closed first the screws are recessed about an 1-1/2 below the top of cowl open hood and unscrew the both sides of cowl and remove than remove center watch the washer hoses now will have access to the wiper transmission mark where transmission is before unbolting motor and transmission remove motor install is in reverse

Posted on Feb 10, 2010

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GARYca
  • 672 Answers

SOURCE: 2000 chevy silverado 1500 battery light keeps

When was the alternator replaced? was it a remanufactured alternator? This is common on GM trucks, fluctuating voltage is caused by a faulty alternator voltage regulator. Have the alternator tested, strong possiblityits defective!!Hopefully this helps!!

Posted on Mar 15, 2010

Molson02536
  • 3854 Answers

SOURCE: 1999 1500 Chevy Silverado - microchip for anti-theft?

Document ID# 803013
1999 Chevrolet Chevy K Silverado - 4WD

Security Lamp Illuminated on the IP, Engine Stalls, No Start, DTC B2960 (Security System Sensor Data Incorrect but Valid) Set (Inspect and Repair Cause of DTC B2960)
1999-2001 Chevrolet and GMC C/K Pickup and Utility Models (Silverado, Sierra, Tahoe, Suburban, Yukon, Yukon XL)

This bulletin is being revised to add information on inspecting for electrical intermittent conditions and important connector C201 tightening steps. Please discard Corporate Bulletin Number 01-08-56-002 (Section 08 -- Body and Accessories).

Condition
Some customers may comment on the following conditions. These symptoms may be intermittent.

• Security lamp illuminates while driving. The Security lamp may be On or Off when the customer brings the vehicle to the service facility.

• The engine cranks but will not start and the Security lamp is flashing.

• The engine starts then stalls and the Security lamp is flashing.

Cause
Condition(s) may be due to an incorrect Passlock™ sensor voltage received by the body control module (BCM) from the Passlock™ sensor due to the following conditions. Most intermittent conditions are caused by faulty electrical connections or wiring.

• A 7 ohm variation in the sensor ground circuit wiring, circuit 1057

• A 100 ohm variation in the Passlock™ sensor signal wiring circuit, circuit 1836

Inspect for the following items:

• Broken wiring inside the insulation.

• A poor connection between the male and female terminal at the connector. Refer to Testing for Proper Terminal Contact under Testing for Intermittent and Poor Connections in Wiring Systems for the specific procedure.

• A poor terminal to wire connection. Some conditions that fall under this description include poor crimps, poor solder joints, crimping over the wire insulation instead of the wire itself, and corrosion in the wire to terminal contact area.

• Wire insulation that is rubbed through. This causes an intermittent short as the bare area touches other wiring or parts of the vehicle.

• A poor connection between the male and female terminal at a connector. This poor connection may be the result of contamination or deformation.

- Contamination may be caused by the connector halves being improperly connected. A missing or damaged connector seal, damage to the connector itself, or exposing the terminals to moisture and dirt can also cause contamination. Contamination, usually in the underhood or underbody connectors, leads to terminal corrosion, causing an open circuit or intermittently open circuit.

• Separate the connector halves.

• Visually inspect the connector halves for contamination. Contamination may result in a white or green build-up within the connector body or between terminals. This causes high terminal resistance, intermittent contact, or an open circuit. An underhood or underbody connector that shows signs of contamination should be replaced in its entirety including the terminals, the seals, and the connector body.

- Deformation is caused by probing the mating side of a connector terminal without the proper adapter, improperly joining the connector halves, or repeatedly separating and joining the connector halves. Deformation, usually to the female terminal connector tang, can result in poor terminal contact causing an open or intermittently open circuit. Using an equivalent male terminal from the J 38125-B, test that the retention force is significantly different between an good terminal and a suspect terminal. Replace the female terminal in question.

Correction
Have any of the following components had service recently?

• The BCM

• The ignition lock cylinder case assembly

• The PCM/VCM

If any of the above components have been replaced, the Programming Theft Deterrent System Components procedure must be performed before any diagnostic procedures are performed.

To assist in diagnosis, the following steps are provided.

Does the engine start? If not, use the Engine Cranks but Does Not Run diagnostic information in the Engine Controls sub-section of the applicable Service Manual.
Important:

• The Security telltale on the message center is controlled by the vehicle theft deterrent (VTD) system and the content theft deterrent (CTD) system. The Security telltale is controlled by the BCM through the Class 2 data line.

• The VTD system portion of the BCM controls the Security telltale when the ignition switch is in the On position. The VTD system uses the Security telltale as a malfunction indicator.

• The CTD system portion of the BCM controls the Security telltale when the ignition switch is in the Off position. The CTD system uses the Security telltale to identify system status.


Observe the Security indicator lamp in the instrument panel.
Remove the key from the lock cylinder.
- Security indicator should be Flashing when the door is open.

- Security indicator should be Off when all the doors are closed.

- If the Security indicator does not come On or go Off correctly, refer to the Content Theft Deterrent System diagnostic and repair information in the applicable Service Manual.

With the Doors closed, place the key in the lock cylinder and turn to the Run position. Observe the Security indicator lamp.
- Lamp is On and does not go Off however, the engine starts. This indicates that the VTD system detected a fault when the engine was running.

- Lamp flashes On and Off. This indicates a problem has been detected by the VTD (Passlock™) system and the engine may not start this key cycle, a current condition.

Important: You must diagnose the diagnostic trouble codes (DTCs) in the order specified in the DTC table shown below. Failure to do so may result in one or more of the following conditions:


• Extended diagnostic time

• Incorrect diagnosis

• Incorrect parts replacement


DTC
Diagnostic Procedure
Module

Important: Before you use this table, diagnose P0601, P0602, P0604, and P0606. Refer to Diagnostic System Check - Theft Deterrent.

PXXXX Other PCM DTCs

Refer to the following procedures:

• Diagnostic System Check - Engine Controls in Engine Controls - 4.3L

• Diagnostic System Check - Engine Controls in Engine Controls - 4.8L, 5.3L, 6.0

• DTC P0192 in Engine Controls - 6.6L

• Diagnostic System Check - Engine Controls in Engine Controls - 8.1L


If none of the above items are true, proceed with the following steps:

Install seat covers.
Connect the scan tool to the diagnostic link connector (DLC).
Enter scan tool diagnostics.
Select the model year of the vehicle.
Select light truck.
Select F1, (Body).
Select "C" or "K" for Series.
Select F0, Body Control Module.
Select F0, (Diagnostic Trouble Codes (DTC)).
Select F0, (DTC information).
Select F0, (Current DTC).
Record on the repair order any current DTCs displayed. If none, skip the next step.
Is a current B2960 DTC displayed? If no, the condition is not present with this key cycle. Continue to the next step.
Select Exit.
Select F1, (History DTC).
Are any history DTCs other than B2960 present? If so, diagnose those DTCs first using the appropriate service information, otherwise continue.
Select Exit.
Select Exit.
Select F1, Data Display.
Select F6, Security.
Cycle the key to the OFF position and wait 20 seconds.
Slowly turn the key to the RUN position. Be careful not to turn the key into the START position.
Observe the following values:
- Passlock™ Data Voltage should be 5.0 volts.

- Passlock™ State should be Normal.

- Passlock™ Code should be Open.

Rotate the key to the START position, and observe the following again:
- Passlock™ Data Voltage should be less than 5.0 volts. Passlock™ Data Voltage should remain steady and not fluctuate. The test vehicle used for this diagnostic procedure had a voltage value of 2.49 volts. The vehicle being worked on may be either higher or lower than this value. The key is that it has to be less than 5.0 volts.

- Passlock™ State should be "Monitor Passlock™".

- Passlock™ Code should be Valid Code.

If no trouble is found and the customer has experienced one of the symptoms or the code is a history DTC, the most likely cause is the VTD (Passlock™) wiring, specifically the wires from the VTD (Passlock™) sensor to the BCM.

Posted on May 14, 2010

  • 396 Answers

SOURCE: 1999 chevy silverado service 4 wheel drive light

I had a similar problem with the Service 4 Wheel Drive light which came on intermittently then became more consistent in the message center display. It would go into 4 wheel drive if the message center did not display the Service 4 Wheel Drive message in the message center, but not when the message was displayed. I found the transfer case switch module in the dash was defective, and it has been working with no other problems for three years.

Posted on Jul 22, 2010

355ttrex
  • 249 Answers

SOURCE: 2006 Chevy Silverado alternator intermittent charging

Perfectly normal.
Starting with the 2005 model year, light duty full size pickups and utilities are equipped with a new Regulated Voltage Control (RVC) system. This system reduces the targeted output of the generator to 12.6-13.1 volts when in "Fuel Economy Mode" to improve fuel economy. The generator may exit "Fuel Economy Mode" if additional voltage is required. This will cause the voltmeter to fluctuate between 12 and 14 volts as opposed to non-regulated systems that usually maintain a more consistent reading of 14 volts. This fluctuation with the RVC system is normal system operation and NO repairs should be attempted.

Posted on Jul 22, 2010

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1 Answer

Replaced alternator twice,battery light come on after 1 day and pulls battery down.


Hi.
There's no good news here !
First charge the battery, start vehicle , allow to idle (put volt meter on ) battery voltage should rise . Turning on headlights and observing rise in heater motor speeds or interior light illuminaion on accelleration should be observed ! If the battery voltage does'nt rise , replace alternator (not what you want to hear but has to be done )
So good alternator and running , everything ok. if vehicle fails to start after this, check battery condition and possibly replace.
Good Luck

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Oct 30, 2010 | 1999 Chevrolet Silverado 2500

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My 1999 chevy silverado will not consistently start and when it does run will die when I come to a stop, the battery indicator is on and none of the electrical works in the cab?


have your alternator checked. your chevy is probably running on the battery which is probably only receiving a particle charge from the alternator. I had a chevy did the same thing when ever the alternator was going out.

Jul 19, 2010 | 1999 Chevrolet Silverado 1500

1 Answer

My 2000 Chevy Blazer battery light is on. This


Could be anything from corrosion on cables, loose cables, lose or faulty wiring of wires behind alternator
defective voltage regulator. Visually inspect all the items noted. Then use a volt meter and measure the charging voltage of the alternator. It must be between 13,5 to 14.5 volts with and without accessories on at idle and 2000rpm. Anything below 13.5 weak battery or defective alternator ,lose wiring , corrosion. Anything above the 14.5 volts is a defective regulator.

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2000 chevy silverado 1500 battery light keeps coming on then going off.The voltage meter on the dash will flutter also.This has been going on for awhile now until the other day it came on and stayed on...


When was the alternator replaced? was it a remanufactured alternator? This is common on GM trucks, fluctuating voltage is caused by a faulty alternator voltage regulator. Have the alternator tested, strong possiblityits defective!!Hopefully this helps!!

Mar 15, 2010 | 2001 Chevrolet Silverado 1500

1 Answer

2001 CHEVY SILVERADO 2500HD BATTERY LIGHT FLASHES INTERMITTENTLY. NO PROBLEM WITH BATTERY OR WITH ALTERNATOR, BOTH OF WHICH TEST OK. NO PROBLEM WITH STARTING OR RUNNING, EXCEPT FOR THE FLASHING BATTERY...


2001 chevy silverado 2500hd battery light flashes intermittently. no problem with battery or alterntor. both tested ok. no problems with starting or running. voltage gauge reads just above 14. no problems with anything except battery light flashes. what could be the problem?

Dec 04, 2009 | 2001 Chevrolet Silverado 2500HD

4 Answers

Battery light still on after changing alternator and battery.


Did you check the fuses? Are your cables to the battery corroded? Is your ground wire connection clean . Did you get a cheap-*** alternator? Did they check it where you bought it? You may have to have it checked at a napa or other store. Sometimes "reconditioned" means "repainted"
Hey, I've been there. If its a discount store alternator get another place to check it. May save you some grief.

Jul 08, 2009 | 1999 GMC Sonoma

3 Answers

1997 chevy 1500 wont stay runing


Ok, first, you need a new altemator. When you pulled off the battery cable with the truck running . it caused a voltage spike and fried the voltage regulator, which is internal on this particular altenator. If you want to check to see if the altenator is charging, use a volt meter.

Since it wouldn't start after you put the new altenator on, it could be one of two things, either you got a bad altenator which happens sometimes or, you have a weak battery and the altenator is tryng to charge itself to death.

Apr 10, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

Generator light comes on.


i've got a '79 scottsdale 4x4 myself actually.. the best thing you can do is go buy a cheap voltage meter.. remember the wiring/connections are 30 years old.. so bad wires/connections/gauges/sensors could be all over the place..

for example, my voltage gauge would barely move out of the orange when i got it, i rewired the vitals and it still only reads 13v max, however, when i hook up a voltage meter to the hot alt wire, it reads over 14v..

remember.. old wires=resistance/heat=voltage loss.. this could easily account for a sensor triggering even with a fresh battery and alt

Feb 08, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

Service Engine soon light flashing or constant


code 1637 is a generator l circuit code code 300 is a multiple misfire code. from what you are describing i would lean towards wiring problem with alternator circuit.

The L-terminal circuit from the generator is a discrete circuit into the Powertrain Control Module (PCM) . The PCM supplies the ignition voltage to the generator lamp feed. This ignition voltage is pulled low by the generator once the ignition switch supplies ignition 1 voltage . The voltage stays low until the generator turns. When the generator is up and running, the PCM detects ignition voltage. Therefore, with no failures with the vehicles charging system, the lamp terminal circuit will go low 0 volts when the ignition switch is powered up and then goes to the ignition voltage after the engine is started.

I find it hard to believe you need a third alternator. if you do something is going on to burn them up. have them check wires might have a harness rubbed thru grounding out at times

Jan 26, 2009 | 2000 Chevrolet Silverado

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