2006 GMC Envoy Denali - Page 6 - Answered Questions & Fixed issues


Do you have heat coming out of the heater after the thermostat opens? If you do and the truck is still over heating the head gasket could be blown and burning the antifreeze through the cylinders and thus would cause a rough idle. You may want to run a compression test on the truck. Just to be sure your assumption is correct that the head gasket is good. Have you felt the heater hose to make sure it is circulating through the heater and it is not plugged. Hope this helps.

GMC Envoy Cars &... | Answered on Mar 14, 2017 | 92 views


When guages go crazy, look for the ignition switch to be the culprit, OR the stepper motor behind the tach is going out.

GMC Envoy Cars &... | Answered on Feb 28, 2017 | 22 views


First check your coolant level, you may have a bad thermostat that may need to be replaced if you are not geting coolant flow you may also want to consider a coolant system flush I your vehical has not had one since new

GMC Envoy Cars &... | Answered on Jan 23, 2017 | 24 views


What year ?

GMC Envoy Cars &... | Answered on Jan 20, 2017 | 357 views


Get the system purged as there is a contaminant in the system freezing and blocking the pipes

GMC Envoy Cars &... | Answered on Jan 07, 2017 | 19 views


Take it to any Auto Zone ! They will run a scan for you - there is no charge for this !

GMC Envoy Cars &... | Answered on Aug 24, 2016 | 601 views


The internal resistor may defective. It's easier to just replace it.

GMC Envoy Cars &... | Answered on Jul 24, 2016 | 72 views


It is mounted on the radiator to sense it's temperature.

GMC Envoy Cars &... | Answered on Jul 24, 2016 | 30 views


Look at the vacuum hose on the cruise control actuator. It may have gotten gummy or lost it's grip on a connector.

GMC Envoy Cars &... | Answered on Jul 24, 2016 | 317 views


Shoot some penetrating oil or WD40 on the center hub of the wheel where it contacts the drum. Let it work for 15 or so minutes then wiggle the wheel off the brake drum

GMC Envoy Cars &... | Answered on Jul 24, 2016 | 19 views


You have to run a diagnostics test to get the answer. Diagnostic codes will tell you what is causing the light to come on and will also turn it off once the repairs are made.

GMC Envoy Cars &... | Answered on Jul 23, 2016 | 38 views


Fuel pressure problems, clogged fuel filter, really dirty air filter.

GMC Envoy Cars &... | Answered on Jul 23, 2016 | 19 views


Look at the column switch for the lights. That is what controls the relay. Most likely faulty.

GMC Envoy Cars &... | Answered on Jul 23, 2016 | 134 views


It is not a blockage if coolant is leaking. Determine if the core itself is leaking or a loose hose clamp. Repair as necessary. Don't ignore it since running the engine pressurizes the hoses and will push out coolant causing engine overheating.

GMC Envoy Cars &... | Answered on Jul 23, 2016 | 164 views


Under the car in front of the gas tank.

GMC Envoy Cars &... | Answered on Mar 17, 2016 | 55 views

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