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Questions & Answers
Where is the purge control solenoid and powertrain relay located on 2004 Envoy SLT 4.2L?
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 .
Do a 2004 Envoy SLT 4.2L have a Ignition Module?
Crankshaft position sensor,cam sensor . your vehicle should have coil on plug , a coil at each spark plug !
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.
I have a 2004 envoy which wont move when put into gear. Is this a lockdown mode and how to fix it?
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 ENVOY WHERE IS MODULE RESISTOR
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 ...
Not shifting on accelleration
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
Battery not charging indicator. What could be my issue?
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 Envoy Code P0128
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
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