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  General Motors was originally designed as a holding company for Buick. It was founded on September 16, 1908 in Flint, Michigan. Over a period of time, GM acquired Oldsmobile, Cadillac, Elmore, Oakland --- which would later become known as Pontiac --- and others. GM acquired Reliance Motor Truck Company and Rapid Motor Vehicle Company, which would later become known as GMC Truck. Fuel pressure specifications may vary from one vehicle to the next due to the difference in engine specifications.
  
  

GMC S15 Pickup

• From 1985 to 1990 the GMC S15 used a four-cylinder 2.5-liter engine. This engine required 12 lbs of fuel pressure per square inch. The minimum flow was 29 gallons per hour and the minimum current was 12 volts. The fuel pump was located in the gas tank.
  
  

Savana

• From 1987 to 1996 the GMC Savana used 5.7-liter eight-cylinder engine. The fuel pump for this engine required 12 lbs of fuel pressure per square inch. The minimum flow was 29 gallons per hour and 12 volts was the minimum current requirement. The fuel pump was located in the gas tank.
  
  

Caballero

• The GMC Caballero used a six-cylinder 4.3-liter engine from 1986 to 1987. This engine's fuel pump required 12 pounds of fuel pressure per square inch. The minimum flow was 29 gallons per hour and 12 volts was the minimum current requirement. The fuel pump was located in the gas tank.
  
  

S15 Sonoma

• The Sonoma used a six-cylinder 4.3-liter engine from 1997 to 2001. The fuel pump required 61 pounds of fuel pressure per square inch. The minimum flow was 26 gallons per hour with a 13 volt minimum requirement. The fuel pump was located in the gas tank.
  
  

Yukon

• From 1992 to 1995 the GMC Yukon used an eight-cylinder 5.7-liter engine. The fuel pump required 12 lbs of fuel pressure per square inch. The minimum flow was 29 gallons per hour, while 12 volts was the minimum current requirement. The fuel pump was located inside the gas tank.