Car Problem Reports

Chevrolet Suburban 1500 Check Engine Light Due to Gas Cap Issue

Chevrolet Suburban 1500 Problem
28 Reports
Me Too

Model Years Affected: 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007

Average Mileage: 115,246 mi (60,000 mi - 198,000 mi)


Illumination of the Check Engine Light can be caused by a loose or worn gas cap.

  • After repeatedly getting a Check Engine light after fueling, I took it to a dealership who informed me that the code that showed up when they hooked it up said that I needed a new gas cap. Well, I paid the big $$ there for the cap and a couple weeks later it came on Again!! This time I took it to my normal oil & tire guy who let me in on the real issue (in my case at least!) I hadn't been tightening the fuel cap enough "clicks"!! I might stop at 2-3 & he said turn til you hear at least 10! Otherwise the vehicle senses that as a "leak" in the fuel system, be it fuel or air/compression. This happens quite often in many other makes/models too! Hope this helps someone!

    Flag This
  •  Rookie

    The 'Tighten Gas Gap' came across monitor 2 days ago. I tightened gas gap. The monitor reading went away. This morning, the 'Tighten Gas Cap' came up on my monitor reading again. I turned car off for 1-1/2 - 2 hrs.. When I got back in car, started it up, while driving, the engine light came on. Panicking ..... Called a friend for a car repair persons name & they suggested I google the problem. I did. Yippee!! I found this is a 'problem' w/ this make and model year 2004 Suburban. I tighten the gas cap really, really hard & the engine light is no longer on. Thank you! Thank you! for those who've reported the same challenge.

    Flag This
  • Visitor, , 60,000 mi

    Check engine light came on and would not go off. Repairmen checked vehicle w/instrument and item was corrected

    Flag This
  • Visitor, , 120,586 mi

    Check engine light is still on. Just replaced gas cap.

    Flag This
  • Visitor, , 104,000 mi

    Check Engine Light due to emissions issue that sounds like this one. Tech ran OBD2 scanner on it and found the code related to a fuel system emissions problem. Gas Cap is suspected.

    Flag This
  •  Rookie

    been there done that

    Flag This
  • Check engine light stayed on and once the cap was replaced, it stopped.

    Flag This
Ask a Question