NHTSA — Engine And Engine Cooling Problems

2006 Hummer H3 (Page 2 of 2)


definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
39,800 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2006 Hummer H3 engine problems

engine problem

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2006 Hummer H3 Owner Comments (Page 2 of 2)

« Read the previous 20 complaints

problem #6

Feb 042009


  • 15,100 miles


I have a 2006 Hummer H3 with a little over 15,000 miles on it. There is an issue of "bad cylinder heads" in these 3.5L I5 engines and GM has not stepped up to the plate for a recall. Another cylinder head has been ordered for my vehicle and will be fixed under warranty. What happens when my warranty runs out a year from now. I am not crazy about a dealer tearing down my engine at this point. It has not been broken in yet. I think the whole engine should be replaced. I feel GM knew of this all along and built these SUV's anyway with the hopes that the motors will last until the warranty has expired.

- Norfolk, VA, USA

problem #5

Aug 232008


  • 14,916 miles
Purchased a 2006 Hummer H3 from the seller in this complaint. I paid exactly $23,250 all cash for this vehicle. He actually drove the vehicle to New Jersey from mass. To my residence. The vehicle appeared to be in excellent condition, as it only had 14K miles when I bought it only 3-month's ago. One would hardly think of "hidden" issues at that mileage. In any event, I have had repairs to the rear and front differential, as it had a leak and the front end was out of alignment. The most disturbing thing was this seller lied to me and misrepresented the "true" or actual condition of the vehicle. Unfortunately which would surface after he left with my $23,250 in cash! I would E-mail the seller and told him he misrepresented himself and the condition of the vehicle and how he apparently abused it. More importantly, I discovered "excessive" rust underneath this vehicle. Because these conditions were not divulged to me by Mr. Johnson, I am having a hard time selling the vehicle that practically cleaned out all of my savings. He claimed this truck was garaged kept and that he did no off road riding. This apparently is totally untrue, as the car would not have as much rust as it is loaded with for a 2006! so, can you tell me what recourse, I may have as a the buyer, besides hiring a private attorney who I can't afford, as I am on permanent disability. There must I something my I can pursue under any state or federal consumer laws, especially, since the vehicle is still under warranty by General Motors.. I should also add that I am having difficulty with a local Hummer dealer "royal Hummer" in florham park, who seemed reluctant to address the many issues I am having with this Hummer! I would also appreciate if you can forward this complaint to General Motors corporation, in Michigan, as they should know I am having difficulty with dealers wanting to honor, as they should, any warranty work! I am prepared to file every complaint I could to get restitution for this apparent.

- Wharton, NJ, USA

problem #4

Jun 082007

H3 4WD 5-cyl

  • Automatic transmission
  • 7,240 miles
A rough idle, chugging / running concern may be encountered with a P0014 dtc. Possible clogged fuel injectors.

- Fort Washington, MD, USA

problem #3

Nov 092006

H3 4WD 6-cyl

  • Automatic transmission
  • 5,000 miles


: the contact stated while driving 40 mph on city streets, the vehicle ran and idled rough. The vehicle was eventually driven to the dealer who determined the cylinder head and valves needed to be replaced.

- Pembroke Pines, FL, USA

problem #2

Jan 012006

H3 5-cyl

  • Automatic transmission
  • 10,000 miles
Vehicle had an engine miss fire that required replacement of the head. Miss. Returned shortly after repairs. Dealer said there was no miss. Vehicle filled up with water during a rainstorm. All interior had to be removed and dried out. Electrical problems occurred that required four batteries over 12 months. Dealer stated it was my problem, because I had a small inverter for computer. Sold the vehicle to the Hummer dealer at a loss of $15,000. Hummer refused any assistance after first stating they would.

- Westfield, IN, USA

problem #1

Jul 172006

H3 5-cyl

  • Automatic transmission
  • 2,400 miles
: the contact stated the engine was misfiring causing the vehicle to lose power while driving at any speed. After losing power, the engine ran rough at the decelerated speed. The vehicle was taken to the dealership four times for this issue. The first time the dealership corrected circuit #239. The second time there was a lose terminal. The third time the #1 cylinder coil was replaced and the fourth time there was a lose wire. The vehicle is running on only four cylinders. The problem recurred again shortly after picking the vehicle up from the dealership.

- Herndon, VA, USA

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