20 Most Recent 2006 GMC Envoy XL Denali Questions & Answers

Broken shock or strut, possibly a low or bad tire.

The shifter cable end is probably broke.

does the oil light is on? if you do not know how to do, take your car to a mechanic. China OBD2 car diagnostic tools wholesale on CareUCar

I service or change trans fluid on all vehicles, every 2 to 3 years max, or they will fail for a fact You do not flush a trans,too much work & lines are disturbed Your asking for trouble removing coolant lines,flushing lets fine debris into solenoids & changing all the fluid sometimes makes them slip, because you never changed the fluid every 25,000 or 3 years, max (50 years experience & former trans shop owner) May have to remove the valve body & clean, if the 1-2 shift valve is sticking or a solenoid is bad Your probably very close to bad news on that trans 8 years with no fluid change is a death sentence

Air actuators (air chambers) on each corner of the vehicle, a compressor to inflate the actuators, ride height sensors and a control ecu to control the function. That's a basic overview, hope it helps

air compressors do not operate below 28 degrees you have to get them warm first I assume that your compressor is under your hood as long as you allow your truck to get cold or keep the air suspension your going to have this problem I’m happy to assist further over the phone at https://www.6ya.com/expert/brock_d67526d2a834c47e

All you have to do is follow the trans cooler lines toany coolerCan call a dealer with your VIN # & they will tell you how it was built

HelloThe engine and transmission in this cars drivetrain is fully electronically controlled by a computer called the PCM (Powertrain Control Module). Whenever a problem like this occurs the computer stores a record of the problem in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s)

possilbe fuel level sensor

it could be a fuse.

There is a bulletin for this problem.You have to go to the dealership and have the air spring sensor calibrated.Only the dealers can do this calibration.It does not take long to calibrate a vehicle.Unless they find a different problem.Hope this helps.Good luck.

check bulbes it is possible they both burnt out. check for 12V at the sockets .

Good place to get a vacuum gauge hooked up and identify problems using that tool. Without the gauge, check your exhaust and see how much if passing through the converter. You can do this by testing the temperature of the exhaust before and after the converter making sure the converter/exhaust isn't restricted. As the vehicle warms up a bad converter can cause the symptoms you are describing.

P1860 = TCC PWM Solenoid Circuit Electrical P0740 = Torque Converter Clutch Circuit/Open and P0785 = Shift Timing Solenoid "A" Maybe spurious codes, I can't tell.

Welcome. Two O2 sensors. One in the exhaust manifold and another after the cat. Feb 9, 2010

How many O2 sensors are there?

trailvoy.com https://www.trailvoy.com > ... > Exhaust Mods

How Many O2 Sensors Are on This Vehicle?

2CarPros https://www.2carpros.com > ... > Location Dec 27, 2021 - Hello, this vehicle has two oxygen sensors, the rear one is behind the Catalytic Converter. Below is a picture of its location to the right side . ..