GMC Cars & Trucks - Recent Questions, Troubleshooting & Support

if your steering wheel spun free when it was disconnected you probably broke the clockspring

GMC Cars &... | Answered on Jun 30, 2020

Diagnostic trouble codes, known as DTCs, are alphanumeric codes that a vehicle's computer outputs when it detects a malfunction.

GMC Cars &... | Answered on Jun 28, 2020

Here are the tie rod end nut torque specs:
• Lower Control Arms - (Front and Rear bolt) 129 ft-lbs x2 and (Knuckle Stud) 37 ft-lbs
• Upper Control Arms - (Front and Rear bolt) 140 ft-lbs x2 and (Knuckle Stud) 37 ft-lbs
• Inner Tie Rods - 81 ft-lbs
• Outer Tie Rods - (Knuckle Stud) Tie Rod nut 44 ft-lbs and jam nut 55 ft-lbs
• Stabilizer Links - 17 ft-lbs
• Rear Shocks - Lower and Upper 85 ft-lbs
• Front Shocks - Module Bolt x2 37 ft-lbs, Module nut x3 37 ft-lbs and Stud nut 37 ft-lbs

GMC Sierra... | Answered on Jun 28, 2020

When you changed the evaporator, you got a leak, you have lost gas and the AC doesn't work now. Get the gauges on it and check the pressures.

I doubt you have the equipment to suck all of the gas out of the system, pressurise it with nitrogen, check for leaks, suck the nitrogen out, create the vacuum and then fill the system with Gas ONLY at the correct weight. Look at the Scotty Kilmer YouTube videos.

GMC Cars &... | Answered on Jun 27, 2020

The overheating probably came from the coolant being too low. The coolant in the reservoir won't go back into the radiator if the coolant in the radiator is too low. Until you get it fixed, check and fill up the radiator every time you want to use it. Overheating is very bad for engines and can cause expensive engine repairs.
Where is it leaking, from the engine or the radiator? You didn't say, but wherever it is leaking is the place to start. If at the radiator, and it is not a loose or leaking hose, I would be looking for a new radiator. If it is leaking at the front of the engine and dripping down from there, you could have a bad water pump. This could be an expensive repair at a shop-not the pump itself-they are not too expensive-but the labor cost in replacing a water pump will add up.

The thermostat would not cause it to leak. But when all is said and done, you will want a new thermostat, after the leak is fixed. They are very cheap and it is just good insurance.

1997 GMC... | Answered on Jun 21, 2020

try changing out the PCM. its responsible for transmission operation. bad PCM means dumb transmission.

GMC Envoy Cars &... | Answered on Jun 20, 2020


2003 GMC Envoy... | Answered on Jun 20, 2020

Did you disconnect the battery? If so, the computer lost it's keep alive memory. Takes about 10 cold starts to relearn everything. OR, you forgot to replace a vacuum line.

GMC Cars &... | Answered on Jun 20, 2020

A PCV valve located in the valve cover. It may be located on or near the intake manifold, as shown here. A PVC valve located on the valve cover, with the hose that leads to it removed. A hose leading to the PCV valve is often kept in place by a clamp

GMC Cars &... | Answered on Jun 17, 2020

Why don't you just cut 2 wires where you know they're good, add 2 new wires, and run them to the back, and by-pass whatever the problem area is, and your done?

1991 GMC C1500 | Answered on Jun 14, 2020

The door chime is sent through the stereo system, the chime comes out through the driver side speaker.

GMC Cars &... | Answered on Jun 11, 2020

Yes, in human terms, you have grafted a new body onto a person. The computer has no idea what is going on with all the sensors (and on an Envoy there are many) that it has been diligently tracking and logging.

Clear all the codes and that should fix it.

GMC Cars &... | Answered on Jun 11, 2020

Remove the three screws holding it in place from under the wheel and it comes out.

GMC Cars &... | Answered on Jun 08, 2020

These torque specs may work find for your car:
• Turn the main bearing bolts = 40 ft.-lbs.
• Turn the connecting Rod Bearing Cap Nuts = 26 ft.-lbs.

2010 GMC Acadia | Answered on Jun 08, 2020

First check the battery and its connections. Check the voltage at the fuse box (12 volts).If all that is ok then make sure the gear shift lever is in park. Wiggle it around a little then try N. Have someone turn the key to crank and hold it there while you hit the starter. Check for 12v at the large wire that goes to the starter. If there are 12 volts there then you may have a bad starter relay.

GMC Cars &... | Answered on Jun 06, 2020

1-8-4-3-6-5-7-2 is the firing order for your GMC

GMC Cars &... | Answered on Jun 05, 2020

Some cars/trucks/SUVs need about 30 miles of driving time to load all the new parts you replaced info into ecu so somtimes runs rough until that process is clear . Also there are different ways to reset your cars computer . The best way I found to be really effective is disconnecting both battery cables and connect a jumper wire between them . But make sure they are clear or the battery of course . Leave the jumper connected for a few minutes then hook em back up and start your engine and go drive around for 20 minutes . Another way is to disconnect the POS. battery cable and turn everything on inside while holding the brake pedal. What it is by doing all this is draining the stored power in the computers capacitors that keep the memory fresh . You want it to forget the defective part and recognize the new one .hope this helps you I know how frustrating these things can be.

GMC Cars &... | Answered on Jun 04, 2020


GMC Cars &... | Answered on Jun 04, 2020

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