Question about 2000 GMC Envoy
I bought a 2000 GMC Envoy ( so I thought.... it has all the markings of Envoy, but VIN lists it as a Jimmy ) Since I bought the truck in July, I have had ongoing issues with it stalling while driving. It would happen with no warning. Initially it would happen every other day, but now I can't even get off my street without it stalling. There were several codes being set. We have: - cleaned the throttle body, after which we drove two days with no issues, this eliminated the EVAP system codes. -replaced the CAT, after which I drove two whole weeks with no issues, now left only with O2 sensor codes. While attampting to replace O2 sensors, one went in effortlessly, the other came out with no difficulty, but taking with it the threading of the crossover pipe. Attempted to drive to garage for new pipe, never got off the street. Truck would not start. Took a boost, started but would not stay running. After several attempts, truck was put into neutral and pushed back into a driveway to wait for a tow. When tow arrived, Truck would not shift out of park, but now would start and stay running. Manually let transmission lever go and put truck into drive, drove back to house, replaced lever. - started looking into ignition switch, found two wires, one small green and one small brown not attached to anything, they appear to be cut clean. Dont know if they are supposed to be attached to anything or not, cannot find a diagram of ignition wiring. - during process of starting and shutting off truck a few times, wiggling ignition, it will now shift. Could a bad ignition switch cause all of this? orignially thought it was a security issue, as it would not allow key to be removed at times. A remote starter was installed, in attempt to bypass ignition key chipset malfunction code. Never had problem after with key not coming out. Please help! I love my truck, but I have had it only three months.... I would love to actually be able to drive it!
Yes, the Ignition switch is tied into the 'shift interlock system', and if the system is never really 'off' the codes may be related.
I'd REMOVE the remote start to ensure you're working from a 'clean slate' and get the ignition switch fixed....likely a dealer item, but call around auto parts stores. You may need to get it 'rekeyed' to match.
Also, a Jimmy and Envoy are identical - the Envoy is the higher trim line of the Jimmy: LINK
Posted on Oct 10, 2012
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Posted on Jan 02, 2017
Smell of the oil,to see if the fuel injector(spider)is leaking into the crank case,if so,the intake will have to be removed to repair the problem,oh,and change the oil.
Posted on Jul 11, 2010
SOURCE: 1997 gmc jimmy
Sounds like the cpi injector assembly. The fuel pressure regulator may be leaking. Or the poppet valves on the injectors may be sticking or shot. I replaced almost every part on my truck and that is what it ended up being the whole time. It's a common problem on these models. Hope this helped
Posted on Mar 04, 2009
Tips for a great answer:
Jan 29, 2015 | 2004 GMC Envoy
Oct 15, 2014 | 2003 GMC Envoy
Aug 25, 2014 | 2004 GMC Envoy
following are the general instructions on the start of diagnosing any
electronically controlled engine or transmission problem.
engine and the automatic transmission (transmission control is only
for automatics, engine is still computer controlled no matter the
transmission type) in this vehicle are computer controlled and in
most cases when a fault occurs a fault code is stored in the memory
of the computer control module. There are exception to this, such as
the Mass Airflow Meter and fuel pressure problems. What must be done
is to have all the basic testing done such as a scan of the system
for fault codes as well as a check with a live data scanner tool for
engine functions that are not within range of normal, a trained
technician is required to know what is correct and what isn't, then
based on careful diagnostics done from a factory repair manual the
correct part is replaced or the wiring repaired or the computer
replaced (known as the PCM), which is very rarely the problem. Other
basic checks must be done as well such as mechanical problems with
the engine as well as engine state of tune and mileage on the engine.
The transmission can have mechanical issues as well such as no gear
engagement at all or a failed pump or other pressure related
Oct 10, 2012 | 2000 GMC Jimmy
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