GMC Cars & Trucks - Recent Questions, Troubleshooting & Support


I'm not sure what you are writing. Does the gear shift selector move but without any resistance? If so, this could be a broken shift cable. If not, the transmission could have lost power and is in need of some type of repair. I would like to provide you with more information but I need more specific details about your SUV, warning lights, maintenance history, recent repairs or engine codes. Did this failure happen out of the blue or get progressively worse over time? Let me know if you can think of anything else. Good Luck.

2002 GMC Envoy | Answered 8 hours ago


Yes the fuel pump has a speed controller, it works by varying voltage to the fuel pump based on engine load condition and other factors.

GMC Cars &... | Answered 14 hours ago


Have the speed sensor checked out to make sure it's not thinking your exceeding factory cut off speed . The RPM sensor can also be bad in the same way thinking you are past redline cutting the engine off for safety reasons .

GMC Cars &... | Answered Yesterday


possibly bad bearing. its under warranty see the dealer

GMC Cars &... | Answered 2 days ago


You have to change it with a programmer such as they use at the dealership like the tech 2

GMC Cars &... | Answered on Oct 10, 2018


only on one pin and that is from the battery through a fuse
the rest will be dead until you go to start the engine in which case a second plug get power to close the relay points to allow power to the glow plugs

GMC Cars &... | Answered on Oct 10, 2018


Bulbs are good ???? Did you check for battery voltage with a voltmeter ? View wiring diagram ? To see power flow in the circuit ? Free wiring diagrams here http://www.bbbind.com/free-tsb

Then learn how to test electrical circuits
Electric Testing Techniques You Need to Know

GMC Cars &... | Answered on Oct 10, 2018


I would start by checking all fuses with a test light

GMC Cars &... | Answered on Oct 10, 2018


And is the AC working? If not first have the refrigerant charge checked it may have a leak.

GMC Cars &... | Answered on Oct 10, 2018

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