20 Most Recent 2005 GMC Sierra - Page 3 Questions & Answers

Coolant in system ?? Coolant flowing through 'Heater Core' ?? Code(s) present w/Scanned ?? Possible HVAC issue(s);Blend air door n HVAC box (Under Dash)-Temp Actuator-HVAC control head @ dash..... If you need further help, reach me via phone at https://www.6ya.com/expert/ralph_2f0886b7d6af32ce

1 Scan/ck for code(s) 2 With scan tool connected,road test vehicle/Ck parameters.... ....time for a pro !! If you need further help, reach me via phone at https://www.6ya.com/expert/ralph_2f0886b7d6af32ce

Whats that you say ?? A/T will not shift into Overdrive ?? Is the 'Tow' feature currently requested ?? Has the vehicle been scanned ?? More data needed..... If you need further help, reach me via phone at https://www.6ya.com/expert/ralph_2f0886b7d6af32ce

SEE IF THE GLOW PLUGS ARE WORKING

You first have to find a problem-- before any parts changing takes place So you have no factory service manuals-- I assume, to learn about the system with the problem & trouble charts to follow to find a problem ! The problem is about the HVAC Blend Doors not working correctly & you have to do the required testing for the answer

there is 2 front sensor left and right Under truck on each side of lower radiator Under radiator support. hope it helps

Wiring problem of the 2005 GMC Sierra 1500 6 Failure Date: 07/18/2009

The connector that plugs into the blower motor under the glove box became too hot and melted the plastic resulting in the a/c and heat not to work (this includes the windshield defroster). I've been looking up problems and solutions and found that this is a recurring problem with GMC and chevy trucks yet there has not been any recall, in fact the dealerships have an extremely overpriced kit to fix their faulty wiring. About 66,000 mi.

I would check the connections and look for the ground wire not making good connection....................

my guess would be bad clutch pack inside tranny replace tranny

Hopefully you didn't cut the factory harness

If you don't have wiring diagrams,can't read them,& or work on your own vehicles & their technology,then a repair shop or different dealer, is you only option,that question you knew the answer to

Gas or diesel?

You probably have a trouble code stored in the engine computer for a faulty transmission selector switch. The engine computer thinks the trans is in 3rd gear and not park. Or it really could be stuck in third gear.

Sounds like the blower control module. Alo inpect the multi wire plug,they sometimes get damaged from the heat. The module and plug should be in the immediate vicinity of the blower motor,generally behind or below the glove box

Hey im not 100% sure this is it but it sound like it.. I had this happen to me. their is something in the anti theft system that enables the car to start.. I found a module that you can install yourself.. read over the page and see what you think.. Your truck is on the list for having this issue.. I hope it help

Are there any lights lit on your dash??? It could possibly be the theft system.. I had it happen to me in my buick.. I found a site and it has the lit of cars that it might happen to. With what you described this could be it. check it out and read through it.. Its a very easy fix that you can do yourself!! I hope it helps let me know if u have any questions

Are any light's lite on dash ? check engine ? There are a lot of electronic components on these vehicles. Fuel Injector Control Module for one. Crank sensors, fuel rail pressure sensor , engine computer (ECM) and you should have a professional grade scan tool to work on these vehicles . You could look on YouTube, there are a lot of guys that post auto repair videos there, even ones on diesel's with no start problems.

Usually when this happens you will have a loose contact (earth wire) and it may be hard to find. Try removing the lower cover around the steering column and, with lights on, reach up behind the instrument cluster and wiggle the wires.

It sounds like you have an earth problem (Negative or Black wire on most vehicles) so try tightening the - pole on the battery and make sure it is clean.Also check all earthing points on the vehicle to make sure they are tight.