2008 GMC Envoy - Page 6 - Answered Questions & Fixed issues

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.

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.

Dealer or a junk yard

Under the car in front of the gas tank.

Secondary Air Injection (AIR) Pump (K18) On the left hand frame rail near G304 just behind the electronic brake control module

I found this picture, for secondary air injection pump. It appears, driver side, frame rail, close to the front, hopefully. You have to safely raise and support the vehicle to get at it.

MAKE SURE YOUR OIL IS GOOD & MAINTAINED, IGNITION TIMING OK. THATS A VALVE OR ROCKER ARM RATTLE. USE QUALITY PRODUCTS (OIL & FILTER) IF OK, BRING IT IN

The headlamp driver module (HDM) is an electronic module that provides electrical power to the vehicle low beam headlamps. The HDM is controlled by a pulse width modulated (PWM) ground signal from the body control module (BCM). The BCM determines the desired lamp intensity using the ambient light sensor, multifunction switch and the park brake switch as inputs. In general, the HDM will operate in 1 of 3 modes: ?€¢ Reduced Intensity Mode: This mode is used by features that do not require or allow maximum low beam headlamp intensity such as daytime running lights (DRL) (nominal: 85% duty cycle).

?€¢ Full Intensity Mode: This mode is used by features that require full low beam headlamp intensity such as low beam headlamp operation in manual or auto modes (nominal: 100% duty cycle).

?€¢ Off Mode: This is the default mode of the system that will occur when none of the features described above are active. The BCM will deactivate its PWM output (0% duty cycle) during this mode.

The normal battery voltage input to the HDM must be between 6 and 16 volts DC to operate. Any deviation to these values could cause improper operation. Major components of this system are the BCM, HDM, ambient light sensor, multifunction switch, park brake switch and low beam headlamps. DTC B2575 Headlamp Control Circuit When the body control module (BCM) senses a request for headlamp or daytime running lamp (DRL) illumination, the BCM sends a pulse width modulated (PWM) ground signal to the low beam headlamp driver module through the low beam headlamp driver module control circuit. The low beam headlamp driver module will illuminate the headlamps, adjusting the intensity based on the PWM signal received You best bet is to take your vehicle to a ASE certified repair shop or the dealer >

Turn Off Suspension Switch Before Jacking/Lifting Vehicle ...

repairpal.com > Problems > Lincoln > Navigator Turn Off Air Suspension System Before Jacking/Lifting Vehicle on Lincoln Navigator. Prior to jacking or lifting a vehicle with air suspension, you must turn off thesuspension switch. The switch is generally located in the trunk or on the right side of the passenger foot well. RepairPal Verified.

GMC Envoy Air Suspension Sensor - YouTube

? 4:25 https://www.youtube.com/watch?v=mh8rieTxFEM Sep 27, 2013 - Uploaded by klondikerabbit In this video, I am trying to diagnose and adjust the rear air suspension sensors on a 2003 GMC Envoy. The ... images for envoy where is the air suspension switch

Code means imrc input error bank 1 don't know what that is

Given all the electronics that are on this vehicle it could be anything ! You need to have a diagnostic scan tool hooked up , check for DTC'S , look at engine sensor data parameters ., Do some electrical tests etc.. Is the check engine light on ? Do some home work , read up on the ignition system an engine management system , fuel pressure testing etc... Computer Engine Controls Distributorless Ignition Systems DIS

If the engine starts and runs, how can it be the fuel filter?! The problem lies with the transmission linkage or the tranny itself.

which circuit breaker and for what?