Question about 1997 GMC Sierra

1 Answer

MY 97 GMC 4 LOW LIGHT IS FLASHING IT WILL NOT COME OUT OF 4 LOW. I HAVE CHANGED THE CONTROL MODULE, AND PUT A NEW TRANNY IN. WHEN I SHUT THE KEY OFF I HEAR THE RELAYS CLICKING IN THE CONTROL MODULE AND THE MOTOR ON THE TRANSFER CASE MOVING LIKE IT IS SEARCHING

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 401 Answers

When you replaced the module did you notice any corrosion in the connector green powder
also check the connector at the encoder motor
high resistance in the wiring will cause it not to get the right information
if the wiring is good try a switch
hope this helps you
good luck let me know


Posted on Nov 14, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My tranny will not shift from low gear also i got a yellow light flashing un my cluster dash


You need the Trans control module (TCM) tested for fault codes. This is the first step.

Mar 24, 2016 | 2000 Ford Taurus

1 Answer

97 gmc won't start add starter fluid it runs good what's the problem n what controls injector pulse


How To Replace ICM (Ignition Control Module) on GMC Safari

? 5:31
www.youtube.com/watch?v=z4hYUMGpFjI
Dec 27, 2012 - Uploaded by hoohoohoblin Here is how to replace the ICM - ignition control module on a GMCSafar or ... I have a 1992 astro just died i have fuel i changed coil still no start ...

Aug 22, 2015 | GMC Cars & Trucks

1 Answer

2007 gmc 1500 4wd not working. service light on and lights on switches are off. truck in 4 low


Sounds as if the transfer case control module has gone bad and grounded the circuit to the 4 low actuator. The module is located behind the headlight switch in the dash. You could try tapping the actuator on the transfer case lightly with a hammer to see if it releases.

Feb 23, 2015 | 2007 GMC Sierra 1500

11 Answers

Changed ignition switch now security light stays on and truck starts and kills


You need to relearn the passlock system (security). There are 2 ways. One is with a scanner, which most diy'er wont own an expensive one to do it this way, here is the manual way. Start the truck and let it run until it dies. The security light should then be flashing. Leave the key in the run position until the security light stops flashing (about 10-15mins). After the light stops flashing turn the key off. Try to start the truck again. It should do the same thing (run for a few seconds and then die with the security light flashing). Again wait for 10-15 mins for the light to stop flashing and then turn the key off and repeat the process one last time. That's a total of 3 times. Once you finish the process the 3rd time. Let the truck sit for a minute with the key off. It should now be programmed and start and run normally.

Jun 02, 2014 | 1999 Chevrolet Silverado 1500

3 Answers

Security light


Did you have a new key cut to fit the new lock that also matches the chip in the old key for the computer ?

Jan 16, 2014 | 2003 Chevrolet Express

1 Answer

I have a 1998 chevy k2500 pickup with a 5.7L V8. The problem i am having is with the 4wd. it has a 3 button electronic shift selector. when pressing the 4wd low button it will shift the motor and the front...


First, you do not need 4 low unless you're stuck out in the bush somewhere. Secondly, when you shift from 2 high to 4 high, it goes in immediately. To access 4 low, the tranny shifter must first be put into neutral, wait five seconds, then shift into 4 low. To shift out of 4 low back to 4 high, you must shift into neutral for 5 seconds again. They both flash at the same time because you have not shifted into neutral gear with the transmission.

Feb 02, 2011 | 1998 Chevrolet K2500

1 Answer

2007 GMC Yukon wont start....


Ok supper Dave , let's get this stright , when you turn the key to start the vehicle , what happens ? The starter spins the engine or doesn't spin the engine ? This would be a no crank no start condition . if the engine does spin an doesn't start an run this is a crank no start condition . Now which is it ? The factory radio is hooked to the serial data communication network , did you or who ever installed the aftermarket radio use a interface module ? Are you familiar with the electronics on this vehicle ? BCM - body control module , low current inputs from the ignition switch which determine what mode to put the vehicle in ?

Case 4 Data Bus Issues

The body control system consists of the body control module (BCM), communications, and various input and outputs. Some inputs, outputs and messages require other modules to interact with the BCM. The BCM also has discrete input and output terminals to control the vehicle's body functions. The BCM is wired to the GMLAN high speed serial data buss and the GMLAN low speed serial data buss and acts as a gateway between them. If the BCM does not communicate the vehicle will not start due to the inability of the engine control module (ECM)/powertrain control module (PCM) and theft deterrent module (TDM) to communicate without the BCM providing the gateway function.

Power Mode Master
This vehicles body control module (BCM) functions as the power mode master (PMM). The ignition switch is a low current switch with multiple discrete ignition switch signals to the PMM for determination the power mode that will be sent over the serial data circuits to the other modules that need this information, and so the PMM will activate relays and other direct outputs of the PMM as needed. Refer to Power Mode Description and Operation for a complete description of power mode functions.

Sorry but I am a GM Tech . have been for over thirty years , Cadillac , Buick an Chevy .audio buds think it's something else. Your audio buds don't have a clue ? When change something you better well know what your messing with. .

Apr 11, 2017 | 2007 GMC Yukon

1 Answer

97 dodge digital dash quits working


I had a problem with the dashboard indicators for 3 years. Kept all flluids properly leveled and changed, etc. while I put on an estimated 35000 miles on while driving blind, because I refused to pay Chrysler 1500 to 2000 to experimentally repair my vehicle.

A saint at a salvage yard on day said it was the thermostat control module (The panel controlling defrost, rear wiper, and climate control above the cup holders between the two front seats). I replaced it for 30 bucks (used) in 5 minutes, and low and behold, everything works again.

Turns out they use the control module as a pass through for a portion of the main harness. The module can short out (for what ever reason) and must create noise on the Comm wires, either directly or indirectly, causing the BCM and PCM stop speaking to each other. That in turns shuts down the dashboard.

You can test this without a new module, by simply pulling the module (4 screws: 2 on top, two on bottom behind small plastic cover plate), and disconnecting the wiring cable. You don't even need to disconnect the power, and thermostat dial cable. After disconnecting, start you vehicle, and see if your guages behave properly. If they do, replace the module.

Cordially,
Greg



May 29, 2009 | 1997 Dodge Grand Caravan

Not finding what you are looking for?
1997 GMC Sierra Logo

194 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

75051 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...