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 MANUALSCHEVROLET1986G 30 VAN V8-379 6.2L DSLREPAIR AND DIAGNOSISTECHNICAL SERVICE BULLETINSRECALLSGENERALSCAMPAIGN - LH LOWER CONTROL ARM CRACKINGDEFECT INVOLVED AND VEHICLES INVOLVED
1986 Chevrolet G 30 Van V8-379 6.2L DSL
Defect Involved and Vehicles Involved
1986 Chevrolet G 30 Van V8-379 6.2L DSLSECTION Defect Involved and Vehicles Involved
DEFECT INVOLVED
General Motors has determined that a defect which relates to motor vehicle safety exists in certain 1985-86 P30 commercial model trucks with 350 gas or 6.2L diesel engines, 1985-86 G30 model vans with 350 gas or 6.2L diesel engines, and 1985-86 C30 model trucks built without
heavy duty front suspensions. The left hand lower control arm can crack starting at the rear flange and progress to the ball joint mounting hole and eventually cause the lower ball joint to separate from the control arm. If this happens, a loss of vehicle steering control can occur which could result in a vehicle crash without prior warning.
To prevent this condition from occurring, dealers are to install a reinforcement brace to the left hand lower control arm.
VEHICLES INVOLVED
Involved are certain:
- 1985-86 P30 commercial model trucks with 350 gas (LT9) or 6.2L diesel (LL4) engines,
- 1985-86 G30 model vans with 350 gas (LT9) engines or 6.2L diesel (LL4) engines with or without school bus equipment (B3D) and without recreational vehicle chassis modification (9A2) or heavy duty front suspension (F42), and
- 1985-86 C30 model trucks built without heavy duty front suspensions (F42).
VIN breakpoints these vehicles were built within
Involved vehicles have been identified by vehicle identification Number Computer Listings. Computer listings contain the complete Vehicle Identification Number, owner name and address data, and were furnished to involved dealers with the original campaign bulletin or supplements. Owner name and address data furnished will enable dealers to follow-up with owners involved in this campaign.
These listings may contain owner names and addresses obtained from State Motor Vehicle Registration Records. The use of such motor vehicle registration data for any other purpose is a violation of law in several states. Accordingly, you are urged to limit the use of this listing to the follow-up necessary to complete this campaign. Any dealer not receiving a computer listing with the original campaign bulletin or supplements has no involved vehicles currently assigned.
General Motors has determined that a defect which relates to motor vehicle safety exists in certain 1985-86 P30 commercial model trucks with 350 gas or 6.2L diesel engines, 1985-86 G30 model vans with 350 gas or 6.2L diesel engines, and 1985-86 C30 model trucks built without
heavy duty front suspensions. The left hand lower control arm can crack starting at the rear flange and progress to the ball joint mounting hole and eventually cause the lower ball joint to separate from the control arm. If this happens, a loss of vehicle steering control can occur which could result in a vehicle crash without prior warning.
To prevent this condition from occurring, dealers are to install a reinforcement brace to the left hand lower control arm.
VEHICLES INVOLVED
Involved are certain:
- 1985-86 P30 commercial model trucks with 350 gas (LT9) or 6.2L diesel (LL4) engines,
- 1985-86 G30 model vans with 350 gas (LT9) engines or 6.2L diesel (LL4) engines with or without school bus equipment (B3D) and without recreational vehicle chassis modification (9A2) or heavy duty front suspension (F42), and
- 1985-86 C30 model trucks built without heavy duty front suspensions (F42).
VIN breakpoints these vehicles were built within
Involved vehicles have been identified by vehicle identification Number Computer Listings. Computer listings contain the complete Vehicle Identification Number, owner name and address data, and were furnished to involved dealers with the original campaign bulletin or supplements. Owner name and address data furnished will enable dealers to follow-up with owners involved in this campaign.
These listings may contain owner names and addresses obtained from State Motor Vehicle Registration Records. The use of such motor vehicle registration data for any other purpose is a violation of law in several states. Accordingly, you are urged to limit the use of this listing to the follow-up necessary to complete this campaign. Any dealer not receiving a computer listing with the original campaign bulletin or supplements has no involved vehicles currently assigned.
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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.