20 Most Recent 2004 GMC Envoy - Page 7 Questions & Answers

A flashing check engine light indicates a serious condition with the engine, and the car should not be driven far until that condition is repaired. You need to have the fault codes read to determine what the problem is. You can have this done at Auto Zone for free. If you continue to drive like this, you will destroy the catalytic converter.

Yes, most likely. The linkage needs inspection from the shift lever to the transmission. You may have to check under the vehicle for disconnected linkage AND under the cover of the shift lever inside the truck.

Yes the lighting likely burned out the car's electronic control module(s). Contact your insurance company, this can be a very expensive repair.

Here's a video that may help. GMC Envoy HVAC actuator Replacement

Our research indicates that your vehicle does not have a cabin air filter (also known as a pollen or AC filter). Vehicles without cabin air filters typically have a plastic mesh that prevents leaves and other foreign objects from entering the HVAC system. This mesh is part of the vehicle and does not need to be changed.

Call onstar and cancel the service.

Sounds like a lifter hasn't pumped up . Put an additive in the engine oil that quiets noisy lifters. Any auto parts store or even walmart has it.

Does the starter itself engage at all? Is it engaging and not spinning the flywheel?

It will not idle correctly when at a stop or with the AC on or it will idle way too fast.

Yup. It hasn't started leaking yet but it will soon. Get the pump replaced.

The caliper isn't releasing the pads. Replace the caliper.

How bout the radiator? Is it partially plugged?

There is a draw somewhere. Places to look .... glove box light, under hood light to see if they go off when they're supposed to. Hook up an ammeter between the + post of the battery and the + cable. start pulling fuses one at a time while watching the meter until you find which fuse stopped the draw.

The switch itself.

You have no need to change freon for any reason.

On the large AC hose that connects to the receiver/dryer which is on the passenger side up close to the firewall.

Look for the body control module under the drivers seat. It controls most of everything that happens in the car,