GM H platform
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The H platform, or H-body, name has been used twice by General Motors. The 1970s H-body was an inexpensive rear wheel drive compact automobile platform from the 1970s. The 1980s H-body was a front wheel drive full-size car platform.
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RWD
The 1970s H-bodies had 4, 6, and 8-cylinder longitudinal GM engines, a solid rear axle, and had a unibody construction. The Chevrolet Vega was designed to use a small-block V8, but this was not approved. The Chevrolet Monza was originally designed to use a Wankel engine but this project was cancelled. No H-body had 4 doors, though wagon versions were offered. The fourth character in the Vehicle Identification Number for an H-body car is "H". The platform was introduced with the 1971 Chevrolet Vega and replaced by the GM J platform in 1981.
Many vehicles used this platform including the following cars:
- 1971-1977 Chevrolet Vega/Pontiac Astre
- 1975-1980 Chevrolet Monza/Buick Skyhawk/Oldsmobile Starfire/Pontiac Sunbird
External link
- H-Body.Org (http://www.h-body.org)
- H-Body FAQ (http://h-body.org/library/hbodyfaq/index.html)
- Bob Gumm's V-8 Monza Site & Message Board (http://www.v8monza.com)
FWD
The 1980s H-bodies were large front wheel drive cars with a 110.8 in wheelbase. Most H-bodies used GM's large 3800 V6, and supercharged versions were introduced later.
The following vehicles used this platform:
| Years | Wheelbase | Model | Previous platform | Next platform |
|---|---|---|---|---|
| 1986-1999 | 110.8 in | Buick LeSabre | GM B platform | GM G platform |
| 1986-1988 | 110.8 in | Delta 88 | GM B platform | Retired |
| 1992-1996 | 110.8 in | Oldsmobile 88 Royale | Retired | |
| 1989-1999 | 110.8 in | Oldsmobile 88 | Retired | |
| 1996-1999 | 110.8 in | Oldsmobile LSS | Retired | |
| 1997-1998 | 110.8 in | Oldsmobile Regency | Retired | |
| 1987-1999 | 110.8 in | Pontiac Bonneville | GM G platform | GM G platform |