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My 2004 gmc envoy (automatic) seems to slip in low and second when in drive but not if I put it in L1 Or L2. If I let off gas it does shift then. what could be problem?
Re: My 2004 gmc envoy (automatic) seems to slip in low...
Could be as simple as a fluid and filter change and a linkage adjustment. Doesn`t sound serious. I woud try those two things. One at a time starting with the fluid and filter.
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There are a few potential issues that could be causing your 2004 GMC Envoy SLT to go into 4-low but not 4-high or 2-wheel drive. Some possible causes include:
Transfer case issues: The transfer case is responsible for controlling the engagement of the different drive modes. If the transfer case is damaged or malfunctioning, it may not be able to engage 4-high or 2-wheel drive.
Shift motor issues: The shift motor is responsible for controlling the engagement of the transfer case. If the shift motor is damaged or malfunctioning, it may not be able to engage 4-high or 2-wheel drive.
Vacuum issues: The vacuum system is responsible for controlling the engagement of the transfer case. If there is a problem with the vacuum system, it may not be able to engage 4-high or 2-wheel drive.
Wiring issues: The wiring that controls the transfer case and shift motor can become damaged or corroded over time. This can cause the transfer case to not engage 4-high or 2-wheel drive.
Control module issues: The control module that controls the transfer case and shift motor can fail. This can cause the transfer case to not engage 4-high or 2-wheel drive.
It's best to diagnose the issue by a professional mechanic, who can perform a proper diagnosis and repair the issue. They will be able to determine the specific cause of the problem and recommend the appropriate repairs.
sounds like you have a broken shifter cable.Go under the rig and shift the transmision manually.Put on the parking brake and on the drivers side of the trany should be the lever to move.Look for the broken part while you are there it will also help to locate the shift lever on the trany.
My GMC 2004 Envoy when in drive will not shift out of 1st gear. When driving the Transmission doesn't sound like it's slipping. Does anyone know what the problem might be?
I also have a 2002 Envoy. Shifting to and from 4wh and 4wa can be done on the fly but shifting to 4wL has to be done stoped and while in neutral. Try that. Otherwise I'm afraid its a new computer for you. Its located under the left rear seat and you need a loan for one.
Low fluid can cause slipping. (depends upon how low) Most manufacturers post "safe" tow speeds. These are generally ignored. (not good). I recommend towing with driveshafts removed and where driveshaft has a "slip yoke" you install a yoke from a scrapyard and wire it to the tailshaft so it stays in place (keeps oil in and dirt out) Although you can't just detach the tow-bar and drive, it eliminates any possibility of trans damage, since the transmission cannot turn. (most use oil from pump to keep gearsets cool...when towing, pump is not pumping and over time and distance it can damage trans internals.) Hope your problem is just low fluid and not a rebuild...keep in mind what I said though.
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