Question about 2007 GMC Sierra 1500

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I have a 2007 GMC Sierra p/u with the 4.3 motor. Engine light came on a few days ago. No code is on the drivers display. I checked the gas cap, is okay. I put in about 1/2 tank of another brand (Shell) gas to dilute what may be in the gas. Any suggestions? Truck runs great. Light comes on with the key in the on position and when all the other tattle tale lights go out, this one stays on, without the motor running. Is there a reset for this, or is there a problem? Thank you.

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No code is on the drivers display. ??????? Check engine light on ? Need to take an have a scan tool hooked up to read codes .

Posted on Jun 06, 2017


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Posted on Jan 02, 2017

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SOURCE: auxiliary gas tank for a 2007 gmc sierra

go to jcwhitney they have a full line of replacement and auxiliary fuel tanks, as well has the selector valve that switch's from one tank to the other and this does the switching of fuel gauges as well, just go to or call em at 1-800-529-4486 and you may have to call em as its a 2007 may not be listed yet, check with your dealer and see if 06 is the same just in case, but with the 08s coming out already they should have it in stock, also check, they have a full line as well or call them at 1-800-230-3030

Posted on May 18, 2008

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SOURCE: 2007 gmc sierra 2500 IAT sensor

Well, the IAT (Intake Air Temperature) sensor is located on the air intake duct between the filter and the throttle body (Assuming you have the 6L motor). The wires are easily visible at the plug that connects the sensor to the wiring harness. That's the easiest place to access them.

Posted on May 18, 2008

  • 47 Answers

SOURCE: low oil when engine warms up gmc sierra 1995

30-40 psi of oil pressure is fine for many vehicles including your GMC. I am assuming that the truck has more than 100,000 miles on it and still has the original engine in it. By rule of thumb you only need 10 psi per 1000 rpms in a typical street driven engine to give adequate oil pressure to keep the bearings from oil starvation. The oil pressure is typically higher when initial start up occurs because it is more viscous due to the temperature of the oil as the engines oil warms up the visconsity thins out and the oil flows more smoothly. The drop in oil pressure is a normal occurance. Above 45 is more than required for a daily driven street engine. I believe that the specs on that engine only list 30- 45 psi.

Posted on Dec 07, 2008

  • 432 Answers

SOURCE: 1990 GMC Sierra 1500 pickup. Windshield wipers, Cruise Control

May want to look at replacing the wiper circuit board.It is located on the firewall adjacent to the wiper motor and has a some what square black cover with 3 torx screws and wireing harness pluged into the side.We had a truck that every time you washed it the wipers would stay on until it dryed out.You can try removing it and spaying it down with contact cleaner just watch the brease on the two contact tips.Well hope this helps.

Posted on Feb 05, 2010

  • 431 Answers


have it tested using a manual gage if still low then main baring ore most likely bad that would mean a over hall if is really low and bearings bad should be making rattle noise when started up first few seconds

Posted on Mar 11, 2010

Testimonial: "thanks alot.truck is not making a rattling noise.we did check it with a manual read about 10 at idol. press. gets better as you incr speed"

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