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04 GMC Sierra with 4.8 V8 is having charging prob,battery guage up and down making battery not charging display to come on. I changed alt and battery and still have the problem

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  • GMC Master
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If you know for a fact the alternator is good, the problem could be a bad connection between the alternator and the dash, or the alternator and the battery.

Posted on Jan 23, 2013

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 13 Answers

SOURCE: 1998 GMC Sierra radio and display stays on all the time

First of all...does your truck have the retained accessory power (RAP)? If it does, the radio would always stay on with the key off until you open the drivers door. If it does have RAP and the door pin on the drivers door has went bad, then the truck doesn't know that you opened the door and continues to allow accessory power (although it would still cut off after about 20 minutes). If the interior lights come on when you open the door, then the pin is ok. If the lights come on, it could be the RAP relay. If it has gone bad, it is possible it is stuck supplying power and needs replacing. The relay should be labeled in the fuse panel, and there should be other relays in the panel with the same part number. You can swap a relay for the RAP relay and see if it fixes the problem...if it does fix it swap the relays back and replace the RAP relay. If the truck doesn't have RAP then it is possible the problem is in the radio..if you have a friend with a GM car or truck close to the same year you could swap radios and see if that fixes your problem...should be pretty simple. pull the cover off the dash, it just clips on, take out a couple screws that hold in the radio, unplug it and plug in the other radio. sorry so long winded...hope this helps you somewhat.

Posted on Mar 13, 2009

  • 6 Answers

SOURCE: 2000 gmc sierra 1500 5.3 v8. a/c heater control problem

your heat/cool and vent selection options are controlled by engine vacuum through small clear tubes attached to the rear of your climate control interface. Other vehicles have small steel pull wires that operate the desired changes. You might try removing the trim and any fasteners affiliated with the interface/console. GENTLY pull outward and look to see if any of these tubes are pulled off or cut/damaged. Did anyone recently install a new stereo in the vehicle? If so, the vacuum tubing and or pull wires that change your outlets could have been damaged when the stereo unit was pushed into place. Hope this helps

Posted on Sep 09, 2009

Testimonial: "Very good information. THANKS!"

Molson02536
  • 3854 Answers

SOURCE: I changed batteries in my 2003 GMC Sierra key fob

1. Close all doors
2. Insert key into ignition
3. Hold down the power UNLOCK button on the driver's door panel, continue to hold down
until instructed to release in step 9.

4. Perform steps 5 through 8 in a fairly rapid succession.
5. Turn the ignition to the ON position (as far as you can go without starting the engine.)
6. Turn the ignition to the OFF position.
7. Turn the ignition to the ON position (as far as you can go without starting the engine.)
8. Turn the ignition to the OFF position.
9. Release the power UNLOCK button on the door panel. The vehicle should respond by
door locks locking and unlocking automatically. (If locks do not cycle after you let go,
not before you let go of the unlock button, then the vehicle has not entered programming
mode and you must start procedure over. Remove key from ignition, open drivers door
and return to step 1 ). If the locks do cycle automatically then proceed to step 10.

10. Hold down the LOCK and UNLOCK buttons on the remote until the doors lock and
unlock. This may take up to 30 seconds.

11. Repeat step 10 NOW for each additional remote. (Including any existing remotes).
12. Turn the ignition to the ON position to exit the programming mode.
13. Test remote(s).

Posted on Mar 06, 2010

fixitriteman
  • 431 Answers

SOURCE: LOW OIL PRESSURE ON 2007 GMC SIERRA 1500. CHANGED

have it tested using a manual gage if still low then main baring ore most likely bad that would mean a over hall if is really low and bearings bad should be making rattle noise when started up first few seconds

Posted on Mar 11, 2010

Testimonial: "thanks alot.truck is not making a rattling noise.we did check it with a manual gauge.it read about 10 at idol. press. gets better as you incr speed"

wilsodfarm
  • 986 Answers

SOURCE: Torque Specs for Head Bolts on 1997 GMC Sierra V8 5.0 Vortec?

.0L Torque Specs Belhousing to engine bolts 28-38 ft/lbs Camshaft sprocket bolt 40-45 ft/lbs Camshaft thrust plate to engine block bolts 108-144 in/lbs Crankshaft pulley to vibration damper bolts 35-50 ft/lbs Cylinder head bolts -1979-1992 --Step 1 55-65 ft/lbs --Step 2 65-72 ft/lbs -1993-up --Step 1 25-35 ft/lbs --Step 2 45-55 ft/lbs --Step 3 75-85 ft/lbs Differential shaft lock bolt 15-30 ft/lbs Driveshaft U-joint to pinion flange bolts 70-95 ft/lbs Exhaust manifold bolts 26-32 ft/lbs Flywheel mounting bolts 75-85 ft/lbs Front engine mount nuts 72-98 ft/lbs Intake manifold to head bolts --Step 1 96 in/lbs --Step 2 16ft/lbs --Step 3 23-25 ft/lbs Intake manifold (upper intake to lower) 12-18 ft/lbs Oil filter insert to engine block adapter bolt 20-30 ft/lbs Oil pan mounting bolts -1979 --Step 1 (Large bolts) 11-13 ft/lbs --Step 1 (Short bolts) 7-9 ft/lbs --Step 2 (Large Bolts) 15-17 ft/lbs --Step 2 (Short Bolts) 10-12 ft/lbs -1980 to 1987 9-11 ft/lbs -1988 to 1993 6-9 ft/lbs -1994-up 110-144 in/lbs Oil pickup tube to main bearing cap nut 22-32 ft/lbs Oil pickup tube to oil pump bolts -1979 to 1987 10-15 ft/lbs -1988-up 12-18 ft/lbs Oil pump mounting bolts 22-32 ft/lbs Pinion bearing preload 8-14 in/lbs Pressure plate to flywheel bolts 12-24 ft/lbs Rocker arm fulcrm bolts 18-25 ft/lbs Spark plugs 7-14 ft/lbs Timing chain cover bolts 12-18 ft/lbs Vibration damper to crackshaft bolt 110-130 ft/lbs Wheel lug nuts 85-105 ft/lbs

Posted on Mar 16, 2010

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1 Answer

1997 gmc sierra. interior light left on, battery dead, jump started,ran for 15 min. tried to restart after shutting off only thing that happened was drivers lock locks and 3 guages, oil , gas, and pressure...


You probably didn't run it long enough to charge up the battery. Put a voltmeter on it and see if it needs charging, or get it charged up, or get another jump and run it for a half hour and then see if battery is charged up enough to start the engine.

If the security light is on or flashing, you may need to reset the security system.

Oct 26, 2013 | GMC Cars & Trucks

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Voltage gae in my 96 GMC only goes up so far when I turn my key on wondering if its the alt doning this problem I changed the batteries and the relay ?


Stop by a local parts store like Advance, Autozone,etc... and have them do a FREE charging system test. That will keep your gauge honest

Feb 27, 2011 | 1998 GMC Sierra

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85 gmc k1500 battery not charging replaced alt 2 xs ran a ck on the battery alt starter. any help of knowledge why the battery wond charge?


Check your battery cables at both ends make sure the ground cable is connected to the engine. Make sure all connections are tight.

Oct 31, 2010 | 1992 GMC Sierra K1500

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Bad battery or alternator


check alt fuse, check from alt positive post to battery make sure you have 14 at alt and close at battery also if you ran battery down a few times may need to be checked and or charged that and dont be fooled some alternators that are rebuilt just had a little part here or there replaced ya might have got a bad one

Jul 31, 2010 | 2002 GMC Envoy XL

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Tryin to change out an alternator on a 2002 gmc 1/2 ton with a V8


easy job, 1. unhook the positive battery cable 2. take off the serpentine belt, 3. unhook wires from alternator, 4. remove bolts that hold it on. Reverse to install

Apr 10, 2010 | 2002 GMC Sierra

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I have a 2003 GMC Sierra and it just died while I was driving down the road. Now it wont turn over at all. All of the dash lights and locks and radio works. Any ideas?


sounds like a bad fuse check under the hood fuses and do a code search also look on yahoo for instructions and codes

Jan 10, 2010 | 2003 GMC Sierra

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My 04 GMC Sierra has the dash light for the oil pressure out. is there a way to change that bulb or do i need a whole new gauge cluster?


pull the cluster out... it will not be as easy as the older ones. but pull off bake plate exsposing the circuit board.. you will see these little black pieces that will turn then pull out that is the bulb.. get replacement from dealer and pop back in... any probs let me know

Aug 31, 2009 | 2004 GMC Sierra

1 Answer

Voltage gauge is reading 11.5 to 12


if its charging correctly, it should read 13.5 providing the battery is good..id say its the alt, but you cab have it cked free at your local parts store for free

Jun 24, 2009 | 1996 GMC Sierra

1 Answer

Where is the oil level sensor located? oil guage wiggles between 40 & 60 at idle and stays on 60 on the road.


That's not oil level you see on the gauge -- that is oil pressure in pounds per square inch (PSI). It is normal for the pressure to fluctuate when the engine RPM goes down. If it stays on 60 PSI on the road, you are very lucky -- that is excellent oil pressure!

May 28, 2009 | 1999 GMC Sierra

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