20 Most Recent 2004 GMC Envoy SLT Questions & Answers


I take help from online websites that have this service like helping in repair some like reliable-store have instant help.. others are a bit slow which I don't prefer... rest is up to u.. U can also get free manuals

2004 GMC Envoy... | Answered on Mar 08, 2019


The crank sensor is needed for the coils to fire. It is on the drivers side, mounted in the engine block back by the transmission. The injectors are under the plenum. The plenum wraps around them. I wouldn't worry about them right now. And your probably right about being flooded. I would throw new plugs in it when you replace the sensor.

2004 GMC Envoy... | Answered on Jan 12, 2017


Powertrain relay ? Maybe you mean IGN 1 relay ? This supplys B+ power to the coils . relay # 58 in the under hood fuse box .
Is there B+ voltage at the coil's pink wire ?
Evaporative Emission (EVAP) Canister Purge Solenoid (LL8)
On the left side of the engine block
Engine Controls Component Views in Engine Controls - 4.2L
Engine Controls Connector End Views in Engine Controls - 4.2L
Evaporative Emission (EVAP) Canister Purge Solenoid (LM4)
On top of the engine, toward the front
Google picture of solenoid so you know what your looking for .

2004 GMC Envoy... | Answered on Dec 05, 2016


Crankshaft position sensor,cam sensor . your vehicle should have coil on plug , a coil at each spark plug !
Ignition Coils
Each ignition coil has an ignition 1 feed and a ground. The PCM supplies an ignition control (IC) circuit. Each ignition coil contains a solid state driver module as its primary element. The powertrain control module (PCM) signals the coil driver to initiate a firing event by applying a signal to the IC circuit at the appropriate time. When the signal is removed, the coil fires the spark plug. The spark plugs are tipped with platinum for long wear and higher efficiency.
During normal operation the powertrain control module (PCM) controls all ignition functions. If either the crankshaft position (CKP) or camshaft position (CMP) sensor signal is lost, the engine will continue to run because the PCM will default to a limp home mode using the remaining sensor input. As mentioned above, each coil is internally protected against damage from excessive voltage. If one or more coils were to fail in this manner, a misfiring condition would result. Diagnostic trouble codes are available to accurately diagnose the ignition system with a scan tool.
If a crank sensor is replaced a Crankshaft Position System Variation Learn must be done and a scan tool is need to do this.

2004 GMC Envoy... | Answered on Dec 01, 2016


its most def a purely transmission issue i believe its the solenoids. have it taken to a reputable trans shop near and have them diagnose it with there speciall code reader.

2004 GMC Envoy... | Answered on Jul 23, 2016


if their is a check engine light have the code read ------no such thing as lock down mode you have limp mode which will let you limp vehicle home or to a shop or off road safely sounds like a transmission problem check fluid --look and smell if it looks burnt brownish and or smells burnt try a flush with a fluid and filter change may gey lucky ---look under vehicle and check the selector cable and connections sometimes disconnect or rot away lastely possible internal problem which would need a transmission specialist to look at

2004 GMC Envoy... | Answered on Jun 04, 2016


2002 - 2009 GM BLOWER MOTOR RESISTOR - YouTube

? 4:17
https://www.youtube.com/watch?v=WWi-_-kY-dM
Sep 5, 2012 - Uploaded by davesgarage512
I have a 2003 GMC Envoy and my issue is when I shut the blower off it still ... Can this issue also be remedied ...

2004 GMC ENVOY Blower Motor Control Module / Resistor



2004 GMC Envoy... | Answered on Nov 30, 2015


Start by ensuring fluid level for transmission is correct. Is the check engine light on? If so, the transmission control module may have code stored in it to point you in the right direction. You can also try disconnectint/reconnecting battery which will reset transmission module.If problem corrects itself,keep driving to see if it reoccurs. If problem occurs immediately, recommend transmission diagnostics b efore costly repairs develop

2004 GMC Envoy... | Answered on Jul 04, 2015


Who did the testing & did both the
battery & alternator fail at one time?

Auto Zone has a repair facility & did the work?

What codes are present?

Did anyone look at a data base, to see what
the message your getting was & the solution?

2004 GMC Envoy... | Answered on Aug 16, 2014


This means that the engine's PCM detected that the engine has not reached the required temperature level within a specified amount of time after starting the engine. The intent of the P0128 code is to indicate a faulty thermostate if its not overheating get it to a mechanic its probly stuck open

2004 GMC Envoy... | Answered on Dec 11, 2013


If you changed ignition switch, check to see that key sensor is properly connected.

GMC Cars &... | Answered 6 hours ago


The service and repair manual with help you step by step help to locate and fix the problem on your own easily and you will get the manual from the given link https://toolsnyou.com

GMC Cars &... | Answered 6 hours ago

Not finding what you are looking for?
2004 GMC Envoy SLT Logo

19 questions posted

Ask a Question

Usually answered in minutes!

Popular Products

2004 GMC Envoy
2004 GMC Envoy

2,171 Questions

2000 GMC Jimmy
2000 GMC Jimmy

1,327 Questions

2002 GMC Envoy
2002 GMC Envoy

1,362 Questions

2003 GMC Envoy
2003 GMC Envoy

1,325 Questions

1997 GMC Jimmy
1997 GMC Jimmy

1,099 Questions

Top GMC Experts

Marvin
Marvin

Level 3 Expert

84565 Answers

Jonah Oneal

Level 3 Expert

14092 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22484 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

View Most Popular

GMC Cars & Trucks

  • GMC Cars & Trucks

Most Popular Question

crankshaft position sensor operate job

  • Cars & Trucks
Loading...