User:Paul mcvicker245

The GMC Jimmy is a full-size sport-utility vehicle that was built by General Motors. GM's smallest full-size SUV, it is part of the Chevrolet C/K truck family. Introduced to the Chevrolet line for the 1970 model year GMC introduced its own model of the truck, called the Jimmy, which was discontinued in 1991 and replaced by the Yukon. The "Jimmy" name was chosen to reflect how GM may sound in a similar manner to how Jeep was thought to be a pronunciation of GP in the competing market.[citation needed] Both were short-wheelbase trucks and available with either rear- or four-wheel drive. , The K5 Blazer and Jimmy had "full convertible" removable tops until 1975. For 1976, GM introduced a half-cab design that was less prone to leaks and slightly safer in a roll-over. These half cabs had the convertible top begin a few inches behind the driver/passenger doors and run back to the tailgate. The Blazer's long-wheelbase relative, with an integrated rear body and doors for second row passengers, is called the Chevrolet Suburban.

1970–1972
The original K1500 jimmy was built on the K10 pickup truck platform with a wheelbase shortened to 104 in, designed and marketed to compete with the International Harvester Scout (which had been introduced in 1960 for the 1961 model year) and the Ford Bronco (1965/66) utility vehicles. The Scout and Bronco were originally aimed at the Jeep CJ series and consequently all three vehicles were much smaller than the K1500 jimmy. Because the jimmy was developed from a shortened pickup truck, this innovation both increased interior space and lowered the cost of production by using a shared platform. The jimmy quickly became popular. For the first time, it married the off-road capabilities of competing utility vehicles with "luxury" features like air conditioning and automatic transmissions that routinely were available on pickup trucks.

By 1970, the jimmy was already outselling both of its older rivals. Ford, Dodge, and even Jeep would counter with similar shortened full-size pickups, including the Dodge Ramcharger and Jeep Cherokee, both introduced in 1974, and the revised Ford Bronco (1978).

For its first model year (1970), the K1500 jimmy was available with part-time four-wheel drive only. As an option, a removable hardtop or a soft convertible-top could be specified; passenger seats also were optional on the base model. For 1970, a rear-wheel drive model was added, and the truck was also rebadged as the GMC Jimmy.

Mechanical
There were four choices for power plants, matching the contemporaneous pickup truck options: the 250 straight-6, the 292 straight-6, the 307 V8, and the 350 V8.

There was also a choice between a three-speed automatic transmission, the Turbo-Hydramatic TH350, or one of two fully-synchronized manual transmissions: a three-speed, or a four-speed (SM465), which included a "granny gear" low-ratio 6.55:1 first gear. The 350 was offered only with the SM465 or TH350; manual locking front hubs were optional.

The four-wheel drive version had a solid front axle and used leaf springs front and rear. The two-wheel drive version came with independent front suspension and rear trailing arms, both with coil springs. Both versions used drum brakes on all four wheels until 1971, when the entire GM light truck line was fitted with front discs as standard equipment. A tachometer was optional. Two transfer cases were offered: the Dana 20, available only with the manual transmissions, or the NP-205, available with both types of transmissions. The Blazer had 8 in of ground clearance and an approach angle of 35°.


 * Engines:
 * 250 in³ (4.1 L) I6 (1970–1984)
 * 292 in³ (4.8 L) I6 (1970–1971)
 * 307 in³ (5.0 L) V8 (1970–1973)
 * 350 in³ (5.7 L) V8 (1970–1991)


 * Transfer cases:
 * NP-205 - gear driven part-time four wheel drive
 * Dana 20 - gear driven part-time four-wheel drive

1973–1991
{{Infobox automobile
 * name=Second generation
 * image=GMC K5 Jimmy.jpg
 * caption=1985–1988 Gmc jimmy
 * model_years=1973–1991
 * engine={{ubl|
 * {{convert|250|cuin|L|1|abbr=on}} I6
 * {{convert|292|cuin|L|1|abbr=on}} I6
 * {{convert|305|cuin|L|1|abbr=on}} V8
 * {{convert|307|cuin|L|1|abbr=on}} V8
 * {{convert|350|cuin|L|1|abbr=on}} V8
 * {{convert|400|cuin|L|1|abbr=on}} V8
 * 6.2 L Detroit Diesel V8}}
 * wheelbase={{convert|106.5|in|mm|0|abbr=on}}
 * length={{convert|184.8|in|mm|0|abbr=on}}
 * width={{convert|79.6|in|mm|0|abbr=on}}
 * height={{convert|77.8|in|mm|0|abbr=on}}
 * transmission={{ubl|
 * 4-speed SM465 manual
 * 3-speed TH-350 automatic
 * 3-speed TH-400 automatic
 * 4-speed 700-R4 automatic
 * 4-speed 4L80E automatic (1991)}}