20 Most Recent 2002 GMC Envoy Questions & Answers


Your anti-theft system kicked in for some reason. If you shut it off, the engine will turn over but will not start. A Chevy or GMC dealership is usually required to reset the system, but you'll have to bring it to them. Dealer + Towing = BIG $$$$. A less expensive option would be a mobile mechanic (call them first) or a licenced locksmith. Either way you'll need to show ID and proof of ownership.

2002 GMC Envoy | Answered Yesterday


The best way to fix the problem is getting help from service and repair manual with pictures and diagram which will give you step by step help to locate and fix the problem on your own and you will get the manual from the given link https://toolsnyou.com

2002 GMC Envoy | Answered on Apr 16, 2019


Maybe you are actually running out of fuel ,gas gauge is showing 1/4 of a tank when it is really almost empty . Would not have anything to do with the fuel filter , if it did it would happen when full also .

2002 GMC Envoy | Answered on Mar 20, 2019


Did you check the fuse ? Do you hear the wiper motor running ? If the fuse is good you would need to test the electrical circuit for the wiper motor ,viewing a wiring diagram an then use a DVOM - digital volt ohmmeter to test
What body type is it ? Vin 6 or 3 could have a circuit breaker for power supply or fuse ,both are located in the rear fuse block .

Rear Wiper/Washer System Components
The rear wiper/washer system consists of the following components:
• Rear window wiper motor
• Rear window washer fluid pump
• Rear wash relay
• Rear window wiper/washer switch
• RR wiper 15A circuit breaker
• WASH 20A fuse
Rear Wiper/Washer System Controls
• Body control module (BCM)
• Liftgate control module (LGM)
• Rear wiper/washer switch

Here is how it is controlled

Rear Wiper/Washer System Operation
The rear window wiper/washer switch is an input to the BCM. The requested rear wiper mode is sent to the liftgate control module (LGM) by the BCM as a message on the serial data circuit, and the rear window wiper motor is controlled by the LGM. The switch power circuit to the rear wiper/washer switch is a 12-volt reference supplied by the BCM during ignition on, accessory or RAP power modes. The rear wiper/washer switch is a series of resistors and the switch position is determined by the voltage of the rear wiper/washer switch signal circuit to the BCM. The rear wiper/washer switch has continuity at all times and the BCM expects a rear wiper/washer switch signal voltage in all switch positions including OFF. The rear wiper motor is supplied battery positive voltage and ground. The LGM controls rear wiper motor operation through the rear wiper motor control circuit. The rear wiper motor control circuit is supplied a battery positive reference voltage by the rear wiper motor module and is pulse width modulated to ground by the LGM. The duty cycle of the pulse width modulation determines the rear wiper motor operating mode. The liftglass and liftgate ajar switches are inputs to the LGM and must be in an inactive state in order for rear wiper washer system operation to be enabled. When an ajar switch is active the LGM suspends wiper motor operation directly and sends the ajar switch status messages over the serial data circuit enabling the BCM to suspend washer pump operation. The rear window washer pump is controlled by the BCM through the rear washer relay. Battery positive voltage is supplied to the coil and switch sides of the rear washer relay. When the rear window wash request is active the BCM energizes the relay by grounding the relay coil through the rear washer relay control circuit. When the relay is energized battery positive voltage to the relay switch is supplied to the washer pump control circuit.

Your best bet mite be to have a qualified repair shop check for codes in the BCM or LGM
--------------------------------------------------------------------------------
DTC B1017 or B3970

The rear wiper motor is supplied battery positive voltage and ground. The liftgate control module controls rear wiper motor operation through the rear wiper motor control circuit. The rear wiper motor control circuit is supplied a battery positive reference voltage by the rear wiper motor module and is pulse width modulated to ground by the liftgate control module. The duty cycle of the pulse width modulation determines the rear wiper motor operating mode.

2002 GMC Envoy | Answered on Mar 12, 2019


Nothing you can do , have it towed to a qualified repair shop.

2002 GMC Envoy | Answered on Feb 24, 2019


Yeah , P1234 or B1234 An it want or won't start . You need factory service repair info.to know what this is . For all codes there is a diagnostic trouble shooting procedure . Without this info your best bet ,have it towed to a qualified repair shop. 4WD - 2WD . If P - powertrain code factory info doesn't show this code . What cheap code reader are you using . It's not telling you the correct code . Cheap code readers will do this. Your best bet , take it to a qualified repair shop.

2002 GMC Envoy | Answered on Feb 14, 2019


I don't know but my first check would be on youtube.

2002 GMC Envoy | Answered on Feb 12, 2019


website https://big-manuals.com
helped me repair it within an hour, all by myself!!!! It's amazing, no hassle at all
From wiring d iagrams, schematic illustrations, spark plugs info, parts info, stepwise instructions, torque specs, error/fault codes, engine info, to every single minute parts, you get everyth ing in there you can't imagine how detailed it is

2002 GMC Envoy | Answered on Dec 08, 2018


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 on Oct 15, 2018


Hello good afternon I Need take of top oil “c?rter” but some think about 4x4 don’t can do, My car si GMC envoy 2002

2002 GMC Envoy | Answered on Sep 18, 2018


Hi, I exactly I have a gmc 2002 envoy and I have exactly this problem and we just change the oil and all transmission sensor and is still doing it so what problem can be thank you

2002 GMC Envoy | Answered on Sep 11, 2018


Have the FAN CLUTCH checked. they are a common failure. Get a AC DELCO or the part from the dealer. Why was the radiator replaced? Heater work OK? A/C works OK?

2002 GMC Envoy | Answered on May 27, 2018


look in your owners manual it will tell where the fuse for low beam is. window could be switch, motor or ground. you will need to pull door panel to check motor and wiring.

2002 GMC Envoy | Answered on May 01, 2018


If you let it sit for a while will it then restart ?

2002 GMC Envoy | Answered on Apr 26, 2018


Standard shift trans? Shut vehicle off and select reverse,if you can operate in reverse now,the trans is ok but the clutch may need adjustment or is damaged as it may be dragging and not releasing fully when your foot has the clutch pedal FULLY depressed.

2002 GMC Envoy | Answered on Mar 29, 2018


There's this website www.reliable-store.com
They have books on ALL vehicles.
it covers wiring diagrams, electrical diagrams,
fuse diagram, torque specs, PCV, error codes, fault codes, service info, repair info, parts info, owner's/service/repair/parts/maintenance manuals etc everything totally..
I have 1987 toyota
4runner model and I keep servicing and when needed repair it on my own. worth it !!!

2002 GMC Envoy | Answered on Mar 18, 2018


At
www.reliable-store.com
get complete guide on whether to repair
or not, service it, and how to repair etc, along with wiring diagrams, electrical diagrams, torque specs, error codes, everything.

2002 GMC Envoy | Answered on Mar 13, 2018

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