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Engine & cooling

AM General Hummer Engine problems by year

4 complaints filed with NHTSA about the AM General Hummer's engine & cooling. Stalling, loss of power, oil consumption, overheating, head gaskets, timing chains and engine failure.

Engine complaints by model year

YearEngine complaintsCrashesInjuriesRecalls
19991000
19981000
19951000
19931000

Latest Hummer engine complaints

1998 AM General HummerEngine & cooling

I have a hummer h1 (1998). On my way to the airport in traffic, my #8 engine cylinder wall cracked causing me to lose all my coolent for both the engine and transmission. If I had not noticed it as quickly has I had, I would have come to a screeching halt in the freeway traffic as my engine melted down. Furthermore, I use my hummer for off-roading and had it happened while I was off-road in the utah desert, injury or death would have been quite likely (since I am often 20-40 miles off the highway and it gets to...

Read the full complaint

be 110 degrees f easily). I have checked around and approximately 10% of the vehicles from 1997, 1998, and part of 1999 and 2000 have had the #8 cylindar crack. This is a common problem. The manufacturer used to take care of this but about three years ago stopped covering this under warrantee or even good-will. A total engine failure can be a huge safety concern if the traffic is heavy or if the occupents are not near a town. (Often when I drive through nevada on some very lonely highways, I am 3 hours from the closest town and the heat is immenese). When I am off-road this is even worse and I may be a day or two hike from the nearest (lonely) highway in 110 degree heat. Please look into this as it is a very frequent problem for the affected years. Thank you.

Filed Incident Engine and engine coolingNHTSA 10129353
1999 AM General HummerEngine & cooling

Cylinder wall number 8 cracked leaving the engine useless. *Ph consumer made an investigation about the defect of the vehicle and found out that general motors (gm) knew about the problem on the engine block. Up to this date gm refused to offer any assistance on the replacement of the engine. Dealer said that gm knew about the problem but never gave any notice of a major engine failure.

Filed Engine and engine coolingNHTSA 10062894

Source: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked daily. Complaints are owners' own reports and are not verified. How we use the data

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