20 Most Recent 2005 GMC Envoy XUV - Page 4 Questions & Answers

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

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

What year ?

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

Very well known problem on the I6 engine. It's your fuel regulator, right hand side of the plastic resonator on top. Really should be a recall issue, it's that common.

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

Yup

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

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

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

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

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.

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

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