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Disconnecting oil level sensor connection on a 2002 chevy silerado

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6ya6ya
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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Truck bogs down when I accelerate.

I've got 260K on a 2003 4.8 Silverado. Fuel pump has caused this same problem, 1 after market fuel pump lasted 20,000, the same replacement was 30,000 miles. I made my mechanic put the correct fuel pump from GM using the VIN . The other time I was losing power at about 180K miles it was the cat converter. Hope this helps

Posted on Sep 16, 2009

Biggdex35
  • 333 Answers

SOURCE: chevy silerado 1500 350 v-8 where do

On the low pressure side of your system. The high pressure is by the battery on the aluminum tube hooked up to the radiator. Not that one!! But the other aluminum tube hooked up to your firewall going into the cab. Both of em looks alike. Is a quick coupler fitting with a black cap on it.

Posted on May 06, 2010

DrSpeedo
  • 294 Answers

SOURCE: 2002 Chevy Trailblazer Oil Pressure

Common issue on teh 03-06 Trailblazer instrument clusters, it's caused by failing stepper motors on the cluster's circuit board. It is fixable, check out this page for more on how to get it fixed - Trailblazer oil gauge broken

Posted on Sep 30, 2010

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2 Answers

I have a 2002 jeep Cherokee oil gauge show max out when i start the Eng


When oil is cold, pressure will read high, but as it warms up pressure indicator should drop to normal. Are you using the correct weight oil for your weather conditions? Running straight 30 weight, or say 20w50 could cause this issue.

Dec 19, 2014 | 2002 Jeep Grand Cherokee

1 Answer

How do iremove oil pan 01 montecarlo


OIL PAN
Removal & Installation
1. Disconnect negative battery cable. Remove engine torque strut. Raise and support vehicle. Drain
crankcase. Disconnect oil level sensor electrical connector. Remove oil level sensor and oil filter.
Disconnect front exhaust pipe from manifold. Remove right front wheel and splash shield.
2. Disconnect oil cooler pipes. Disconnect A/C compressor electrical connector. Remove A/C compressor,
and position aside. Disconnect engine mounts from frame.
3. Remove flexplate access cover. Use transmission jack at transaxle to raise engine. Remove oil pan bolts
and oil pan. To install, reverse removal procedure. Install oil level sensor after oil pan is installed. Tighten
retaining bolts to specification. See TORQUE SPECIFICATIONS.

Sep 25, 2014 | 2001 Chevrolet Monte Carlo

1 Answer

Where is the mass air sensor located on a 2002 chevy blazer?


The mass airflow sensor should be right by the throttle body.
Don't disconnect it without disconnecting your battery's negative cable first. You will damage it if you disconnect it with the battery connected.

May 08, 2011 | 2002 Chevrolet Blazer

1 Answer

Oil guage fluctuates at low rpm-2002 chev. silverado. Repair program says unit is on oil pan. Chevy says its on top of motor behind intake manifold.


I believe the sensor in the pan is for the low oil level sensor. The oil pressure sensor is at the back of the engine, by the intake manifold, towards the passenger side.

Oct 23, 2010 | 2002 Chevrolet Silverado 1500HD

3 Answers

Coolant level low light comes on and coolant level is not low in reserve tank or radiator.


There is a TSB for this problem. Here it is.


Bulletin No.: 04-06-02-007

Date: August 11, 2004

TECHNICAL

Subject:
Low Engine Coolant Level Indicator Always On (Diagnose Low Coolant Level System Operation/Check Sensor for Oil Contamination)

Models:
2000-2002 Buick Century, Regal
2000-2001 Chevrolet Lumina
2000-2002 Chevrolet Impala, Monte Carlo
2000-2002 Pontiac Grand Prix
2000-2002 Oldsmobile Intrigue


Condition

Some customers may comment that the low engine coolant level indicator is always illuminated.


Cause

The cause of this condition may be due to engine oil contaminating the coolant. Possible sources of oil contamination are internal engine leaks, improper service procedures, or the addition of some types of anti-leak additives to the cooling system. Once in the coolant, the oil leaves deposits on the level sensor creating an insulating film. This film results in a false activation of the coolant level indicator.


Correction

Diagnose low coolant level system operation and check the sensor for oil contamination using the procedure listed below.


Important: No coolant supplements should be used in GM cooling systems, other than what is approved and recommended by GM. The use of "aftermarket" over-the-counter sealing and cooling supplements may affect the operation of the low coolant level sensor. Discoloration of the coolant recovery bottle is normal and does not necessarily indicate that coolant contamination is present. Flush cooling system only when instructed by this bulletin.

1. Verify that the coolant is at proper level in the radiator and the coolant recovery bottle. If the coolant is low, add proper amount of 50/50 water and DEX-COOL(R) mixture. If the low coolant light operates properly, diagnose the cooling system for loss of coolant as outlined in SI. DO NOT proceed further with this bulletin.

2. Remove the low coolant level sensor. Refer to Coolant Level Module Replacement in the Engine Cooling sub-section.

3. With the key on, the engine off and the coolant level sensor disconnected from the vehicle wiring harness, observe the low coolant light:


^ Light is on - Chassis wiring or instrument cluster concern. Follow the appropriate diagnostic information in SI.

^ Light is out - Proceed to Step 4.



4. With the key off, connect the coolant level sensor into the vehicle's wiring harness. Connect a ground wire (1) to the battery negative terminal. Using a sharp probe (3) attached to the ground wire, ground the coolant sensor probe (2) as shown in the illustration. Make sure a good contact is made. With the key on and the engine off, observe the low coolant light for at least 15 seconds.


^ Light is on - Replace the low coolant sensor and re-check system operation.

^ Light is out - Proceed to Step 5.


5. Using a small wire brush or emery cloth, polish the low coolant level sensor probe to remove any film or oxidation. The probe should be a bright brass color when finished. Use Brake Parts Cleaner to flush removed deposits from the low coolant sensor probe. Re-install the low coolant sensor into the vehicle and proceed to Step 6.

6. Flush the cooling system and install new DEX-COOL(R) mixture as outlined in the SI. Check the vehicle's warranty history to determine if any engine gasket had recently been changed. If there has not been a recent gasket replacement, locate and repair the source of the engine oil contamination.


Oct 31, 2009 | 2002 Chevrolet Monte Carlo

1 Answer

How to change starter on 2000 chevy silverado


These instructions are for a 5.3L. Unless it is a V6 or diesel, the instructions will be similar if you have a different gas V8.
  1. Disconnect the negative battery cable
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Remove the protective shields as necessary.
  4. Remove the starter solenoid shield.
  5. Remove the starter to transmission close out cover bolt.
  6. Disconnect the engine oil level sensor connection.
  7. Remove the front axle mounting bracket through bolt nut, if equipped with four wheel drive (4WD).
  8. Reposition the front axle mounting bracket through bolt until the bolt tip is flush with the support bushing. Do not remove the bolt, if equipped with 4WD.
  9. Remove the mounting bolts from the engine block.
  10. Slide the starter forward until the starter clears the transmission.
  11. Remove the starter transmission close out cover
    1. Disconnect the positive battery cable and wiring harness from the starter.
    2. Remove the starter from the vehicle.
      1. Connect the positive battery cable to the starter. Tighten Tighten the nut to 16 N.m (12 lb in) .
      2. Install the starter transmission close out cover.
        1. Install the mounting bolts to the engine block. Tighten Tighten the bolts to 50 N.m (37 lb ft) .
        2. Reposition the front axle mounting bracket through bolt until the bolt is fully seated. if equipped with 4WD.
        3. Install the front axle mounting bracket through bolt nut, if equipped with 4WD. Tighten Tighten the nut to 90 N.m (67 lb ft) .
        4. Disconnect the engine oil level sensor connection.
        5. Install the starter to transmission close out cover bolt.
        6. Install the starter solenoid shield.
        7. Install the protective shields as necessary.
        8. Remove the safety stands.
        9. Lower the vehicle.
        10. Connect the negative battery cable. Tighten Tighten the bolts to 17 N.m (13 lb ft) .

Oct 01, 2009 | 2002 Chevrolet Silverado

4 Answers

In my 02' Trailblazer oil pressure gauge goes below 0


I have this same problem with my 2002 trailblazer; however, I goofed up and had a mechanic look at it, since I was perplexed as to what was going on with it. He told me the oil pump needed replacing and it ended up costing me around a $950. Needless to say, it still happens. A grand down the drain - it wasn't the oil pump. The oil level is always good. This generally occurs when I've run the vehicle for a while and then come to a stop. It occurs quite often during the spring/summer and doesn't happen all that much during colder months.

Jul 21, 2009 | 2002 Chevrolet Trailblazer Ext

1 Answer

2002 Chevy Trailblazer Oil Pressure


Common issue on teh 03-06 Trailblazer instrument clusters, it's caused by failing stepper motors on the cluster's circuit board. It is fixable, check out this page for more on how to get it fixed - Trailblazer oil gauge broken

Nov 23, 2008 | 2002 Chevrolet Trailblazer Ext

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