Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1985C 30 P/U 2WD V8-454 7.4LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTTECHNICAL SERVICE BULLETINSALL TECHNICAL SERVICE BULLETINSRECALL - FUEL TANK INSPECTION/REPLACEMENTDEFECT & VEHICLES INVOLVED
1985 Chevrolet C 30 P/U 2WD V8-454 7.4L
Defect & Vehicles Involved
1985 Chevrolet C 30 P/U 2WD V8-454 7.4LSECTION Defect & Vehicles Involved
DEFECT INVOLVED
General Motors has determined that a defect which relates to motor vehicle safety, exists in certain recently manufactured 16 and 20 gallon service-part fuel tanks for use on 1975-86 C/K Pickup and 1987-91 R/V Pickup and Cab-Chassis trucks. These service-part fuel tanks may have one or more pairs of the six projection welds which attach the sender-unit retaining ring to the tank that do meet specification. These out of specification welds may fracture during sending unit installation. Normally it would be expected that the installer would notice the welds breaking. However, if this occurred unbeknownst to the installer, the fuel tank could spray some fuel in a collision and/or could leak fuel if the vehicle rolled over. In these instances, if an ignition source were present, a fire could occur.
To correct this condition, dealers will inspect the tank for wet spots or corrosion, then perform a pressure test on the suspect tank to determine if any of the sender ring weld pairs are fractured. If they are, a new fuel tank would be installed. Any required repairs for fuel system leakage caused by other preexisting conditions would be repaired at the customer's expense.
VEHICLES INVOLVED
Fuel tanks involved in this recall are listed. The fuel tanks service 1975-86 C/K Pickup trucks and 1987-91 R/V Pickups and Cab-Chassis trucks, and were sold by GMSPO from December 1, 1993 through September 12, 1994. Enclosed with this campaign is a listing of the involved replacement tanks sold to your dealership. Dealers not receiving a listing have no involved sales at this time.
General Motors has determined that a defect which relates to motor vehicle safety, exists in certain recently manufactured 16 and 20 gallon service-part fuel tanks for use on 1975-86 C/K Pickup and 1987-91 R/V Pickup and Cab-Chassis trucks. These service-part fuel tanks may have one or more pairs of the six projection welds which attach the sender-unit retaining ring to the tank that do meet specification. These out of specification welds may fracture during sending unit installation. Normally it would be expected that the installer would notice the welds breaking. However, if this occurred unbeknownst to the installer, the fuel tank could spray some fuel in a collision and/or could leak fuel if the vehicle rolled over. In these instances, if an ignition source were present, a fire could occur.
To correct this condition, dealers will inspect the tank for wet spots or corrosion, then perform a pressure test on the suspect tank to determine if any of the sender ring weld pairs are fractured. If they are, a new fuel tank would be installed. Any required repairs for fuel system leakage caused by other preexisting conditions would be repaired at the customer's expense.
VEHICLES INVOLVED
Fuel tanks involved in this recall are listed. The fuel tanks service 1975-86 C/K Pickup trucks and 1987-91 R/V Pickups and Cab-Chassis trucks, and were sold by GMSPO from December 1, 1993 through September 12, 1994. Enclosed with this campaign is a listing of the involved replacement tanks sold to your dealership. Dealers not receiving a listing have no involved sales at this time.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.