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General Motors H platform (FWD)

January 01, 1970

See also: List of GM platforms

Main article: GM H platform

The H platform, or H-body designates a General Motors front-wheel-drive full-sized car platform introduced in 1986, and in most respects identical to the front-drive C platform introduced for model year 1985. Originally available in both 2-door and 4-door versions — the latter was more popular and two-door models dropped by 1992. Engines were predominantly the Buick's 3.8 liter (231 cubic-inch) V6 engine and later, GM's Buick 3800 V6; in naturally aspirated and supercharged variants (from 1991 to 1999).

GM H platform (FWD)
1986 Buick LeSabre
Overview
ManufacturerGeneral Motors
Also calledH-body
Production1986–1999
Body and chassis
ClassLarge car platform
Body style(s)2-door coupe
4-door sedan
VehiclesBuick LeSabre
Oldsmobile Eighty-Eight
Pontiac Bonneville
RelatedGM C platform
GM G platform (FWD)
GM K platform (FWD)
Powertrain
Engine(s)Gasoline:
Buick V6
Transmission(s)4-speed THM440T4/4T60-E/4T65-E automatic
Dimensions
Wheelbase110.8 in (2,814 mm)
Chronology
PredecessorGM B platform
GM G platform (RWD)
SuccessorGM G platform

Previously, GM had used the H platform nomenclature to designate the unrelated rear-wheel-drive compact cars. Starting in 2000, all H-body vehicles moved to the G platform, related also to the K platform. GM continued to call it the H platform.[1]

1986-1999 Buick LeSabre edit

The 1986 LeSabre was introduced on the new front wheel drive H platform, foregoing its previous rear-drive B platform. Rebadged variants included the Oldsmobile Delta 88 and the 1987 Pontiac Bonneville, which had immediately prior used the mid-size G platform. The LeSabre used a reverse clamshell hood hinged at the front like the Buick Electra, introduced the year before. The all new flush aerodynamic styling combined with front drive ushered in a new era for the LeSabre.

In 1986 model, the LeSabre featured the 3.0 liter (181 cubic-inch) V6 as standard,[citation needed] with most models from 1986 until 2005 using Buick's 3.8 liter (231 cubic-inch) V6 engine, developing 150 hp (112 kW). Beginning in 1988 the engine was redeveloped to include a balance shaft, with 165 hp (123 kW). For 1991 this engine, called the 3800 V6, made 170 hp (127 kW) with the addition of Tuned Port Injection.

This LeSabre was re-introduced in 1991 for the 1992 model year, and was redesigned along the same lines as the previous year's Park Avenue. The LeSabre was available as a four-door sedan from this point forward until the car was discontinued in 2005. The headlights were streamlined with a separated amber turn signal strip wrapping around the lower front fascia. The rear fascia featured a wider trunk mouth and lower lift over height to ease loading baggage while the front was smoothed with simplified chrome molding and absent bumperettes. The LeSabre also featured GM's plastic body technologies, with high-stress plastic replacing traditional steel in the front fenders. The LeSabre's engine from 1992 to 1995 was the 3800 V6 (L27), which produced 170 hp (127 kW) and 225 lb·ft (305 N·m) The 3513 lb (1593 kg) car got 18 mpg (13.1 L/100 km) in the city and 28 mpg (8.4 L/100 km) on the highway, which was slightly better than the 1991 model. The car accelerated to 60 mph (97 km/h) in 8.9 seconds and could cover the quarter mile in 16.9 seconds at 80 mph (129 km/h). Top speed was electronically limited to 108 mph (173 km/h).

1986-1999 Oldsmobile 88 edit

For 1986, the Oldsmobile Delta 88 switched platforms from the GM B platform to the smaller front-wheel drive H platform, with a wheelbase of only 110.8 inches (2,814 mm). The headlights changed from square sealed beam quads to integrated regular/high beam composite lamps in 1987. The Oldsmobile Eighty Eight was redesigned for 1992, following the redesign of the Ninety Eight the previous year. This was the last Eighty Eight or 88 model from Oldsmobile (along with its performance LSS and Regency models) before being discontinued in 1999 and being replaced in 2001 with the Aurora. The 3.8 L Buick V6 was still the only engine, but output increased to 170 hp (127 kW) and 220 lb⋅ft (300 N⋅m) of torque.

1987-1999 Pontiac Bonneville edit

For 1987, Pontiac decided to change the Bonneville from the rear wheel drive G-body with the V8 to the more economical front wheel drive one-year-old H Body platform with the Buick LeSabre and Oldsmobile 88. Initially, a 150 hp (110 kW) 3.8 L V6 was the sole engine, mated to a four-speed Hydramatic 4T60 automatic and performance was adequate from this pairing. The new Bonneville was placed on Car & Driver's “10 Best” list for 1987, offering both a base model and LE model. For LE models, an SSE sport package was also available that featured a quicker gear ratio, sportier suspension and more standard features, as the Bonneville was intended to have a more sporty, European flavor than the LeSabre and 88.

The ninth-generation Pontiac Bonneville was unveiled on February 8, 1991, at the 1991 Chicago International Auto Show and launched in July 1991 for the 1992 model year; the interior and exterior of the car were completely redesigned. Developed over a 4+1⁄2-year period from 1986 to early 1991 under program director Dave Mitchell, styling work took place from 1987 to 1988, with a final design by John Folden being chosen in 1988 and frozen for production that same year. The first prototypes were built in 1989 and went into testing in mid-1989. In August 1990, production preparation began, with early production "builds" being constructed during late 1990. The first series production models were assembled in May 1991, with SE variants being launched in July 1991.[2] This generation hosted quite a few Bonneville firsts, becoming quicker and considerably safer. One of the most notable improvements over the previous generation was that the Bonneville SE now came standard with a driver airbag and was the first General Motors product equipped with a passenger airbag, while ABS was available as part of the sport appearance package. The SSE models came with standard ABS and traction control.

Vehicles edit

Years Model Previous platform Next platform
1986–1999 Buick LeSabre GM B platform GM G platform
1986–1999 Oldsmobile 88/LSS GM B platform Retired
1987–1999 Pontiac Bonneville GM G platform (RWD) GM G platform (FWD)

References edit

  1. ^ Frame, Phil (January 16, 1995). . Automotive News. Archived from the original on June 23, 2022. Retrieved May 17, 2013.
  2. ^ http://www.pontiacregistry.com/members/viewtopic_chapter.php?p=7421&sid=b585aab6f2dd4f9a441be9679d73108c

January 01, 1970
general, motors, platform, also, list, platforms, this, article, uses, bare, urls, which, uninformative, vulnerable, link, please, consider, converting, them, full, citations, ensure, article, remains, verifiable, maintains, consistent, citation, style, severa. See also List of GM platforms This article uses bare URLs which are uninformative and vulnerable to link rot Please consider converting them to full citations to ensure the article remains verifiable and maintains a consistent citation style Several templates and tools are available to assist in formatting such as reFill documentation and Citation bot documentation August 2022 Learn how and when to remove this message This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources General Motors H platform FWD news newspapers books scholar JSTOR January 2020 Learn how and when to remove this message Main article GM H platform The H platform or H body designates a General Motors front wheel drive full sized car platform introduced in 1986 and in most respects identical to the front drive C platform introduced for model year 1985 Originally available in both 2 door and 4 door versions the latter was more popular and two door models dropped by 1992 Engines were predominantly the Buick s 3 8 liter 231 cubic inch V6 engine and later GM s Buick 3800 V6 in naturally aspirated and supercharged variants from 1991 to 1999 GM H platform FWD 1986 Buick LeSabreOverviewManufacturerGeneral MotorsAlso calledH bodyProduction1986 1999Body and chassisClassLarge car platformBody style s 2 door coupe4 door sedanVehiclesBuick LeSabreOldsmobile Eighty EightPontiac BonnevilleRelatedGM C platformGM G platform FWD GM K platform FWD PowertrainEngine s Gasoline Buick V6Transmission s 4 speed THM440T4 4T60 E 4T65 E automaticDimensionsWheelbase110 8 in 2 814 mm ChronologyPredecessorGM B platformGM G platform RWD SuccessorGM G platform Previously GM had used the H platform nomenclature to designate the unrelated rear wheel drive compact cars Starting in 2000 all H body vehicles moved to the G platform related also to the K platform GM continued to call it the H platform 1 Contents 1 1986 1999 Buick LeSabre 2 1986 1999 Oldsmobile 88 3 1987 1999 Pontiac Bonneville 4 Vehicles 5 References1986 1999 Buick LeSabre editThe 1986 LeSabre was introduced on the new front wheel drive H platform foregoing its previous rear drive B platform Rebadged variants included the Oldsmobile Delta 88 and the 1987 Pontiac Bonneville which had immediately prior used the mid size G platform The LeSabre used a reverse clamshell hood hinged at the front like the Buick Electra introduced the year before The all new flush aerodynamic styling combined with front drive ushered in a new era for the LeSabre In 1986 model the LeSabre featured the 3 0 liter 181 cubic inch V6 as standard citation needed with most models from 1986 until 2005 using Buick s 3 8 liter 231 cubic inch V6 engine developing 150 hp 112 kW Beginning in 1988 the engine was redeveloped to include a balance shaft with 165 hp 123 kW For 1991 this engine called the 3800 V6 made 170 hp 127 kW with the addition of Tuned Port Injection This LeSabre was re introduced in 1991 for the 1992 model year and was redesigned along the same lines as the previous year s Park Avenue The LeSabre was available as a four door sedan from this point forward until the car was discontinued in 2005 The headlights were streamlined with a separated amber turn signal strip wrapping around the lower front fascia The rear fascia featured a wider trunk mouth and lower lift over height to ease loading baggage while the front was smoothed with simplified chrome molding and absent bumperettes The LeSabre also featured GM s plastic body technologies with high stress plastic replacing traditional steel in the front fenders The LeSabre s engine from 1992 to 1995 was the 3800 V6 L27 which produced 170 hp 127 kW and 225 lb ft 305 N m The 3513 lb 1593 kg car got 18 mpg 13 1 L 100 km in the city and 28 mpg 8 4 L 100 km on the highway which was slightly better than the 1991 model The car accelerated to 60 mph 97 km h in 8 9 seconds and could cover the quarter mile in 16 9 seconds at 80 mph 129 km h Top speed was electronically limited to 108 mph 173 km h 1986 1999 Oldsmobile 88 editFor 1986 the Oldsmobile Delta 88 switched platforms from the GM B platform to the smaller front wheel drive H platform with a wheelbase of only 110 8 inches 2 814 mm The headlights changed from square sealed beam quads to integrated regular high beam composite lamps in 1987 The Oldsmobile Eighty Eight was redesigned for 1992 following the redesign of the Ninety Eight the previous year This was the last Eighty Eight or 88 model from Oldsmobile along with its performance LSS and Regency models before being discontinued in 1999 and being replaced in 2001 with the Aurora The 3 8 L Buick V6 was still the only engine but output increased to 170 hp 127 kW and 220 lb ft 300 N m of torque 1987 1999 Pontiac Bonneville editFor 1987 Pontiac decided to change the Bonneville from the rear wheel drive G body with the V8 to the more economical front wheel drive one year old H Body platform with the Buick LeSabre and Oldsmobile 88 Initially a 150 hp 110 kW 3 8 L V6 was the sole engine mated to a four speed Hydramatic 4T60 automatic and performance was adequate from this pairing The new Bonneville was placed on Car amp Driver s 10 Best list for 1987 offering both a base model and LE model For LE models an SSE sport package was also available that featured a quicker gear ratio sportier suspension and more standard features as the Bonneville was intended to have a more sporty European flavor than the LeSabre and 88 The ninth generation Pontiac Bonneville was unveiled on February 8 1991 at the 1991 Chicago International Auto Show and launched in July 1991 for the 1992 model year the interior and exterior of the car were completely redesigned Developed over a 4 1 2 year period from 1986 to early 1991 under program director Dave Mitchell styling work took place from 1987 to 1988 with a final design by John Folden being chosen in 1988 and frozen for production that same year The first prototypes were built in 1989 and went into testing in mid 1989 In August 1990 production preparation began with early production builds being constructed during late 1990 The first series production models were assembled in May 1991 with SE variants being launched in July 1991 2 This generation hosted quite a few Bonneville firsts becoming quicker and considerably safer One of the most notable improvements over the previous generation was that the Bonneville SE now came standard with a driver airbag and was the first General Motors product equipped with a passenger airbag while ABS was available as part of the sport appearance package The SSE models came with standard ABS and traction control Vehicles editYears Model Previous platform Next platform 1986 1999 Buick LeSabre GM B platform GM G platform 1986 1999 Oldsmobile 88 LSS GM B platform Retired 1987 1999 Pontiac Bonneville GM G platform RWD GM G platform FWD References edit Frame Phil January 16 1995 GM H Cars Move to G Platform Automotive News Archived from the original on June 23 2022 Retrieved May 17 2013 http www pontiacregistry com members viewtopic chapter php p 7421 amp sid b585aab6f2dd4f9a441be9679d73108c Retrieved from https en wikipedia org w index php title General Motors H platform FWD amp oldid 1152876208, wikipedia, wiki, book, books, library,

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