Rick's Free Auto Repair Advice

Posts Tagged: Impala

Engine Overheats – GM vehicles

Engine Overheats No radiator fans on GM vehicles, Chevrolet, Impala, Pontiac, Buick, Cadillac GM uses a pretty nifty technique to control the radiator fans on late model vehicles. The system consists of two fans and three relays. When the powertrain control module (PCM) detects the need for cooling from the engine coolant temperature sensor (ECT) at 223 degrees or refrigerant pressure above 190-psi., it provides a ground signal to the low speed fan relay. Power flows to one fan, and the ground for that fan flows to the second fan. … Read More

ABS Light on GM vehicle

ABS Light on Regal, Century, Impala, Monte Carlo, Intrigue, Grand Prix GM really did it this time. Now their cars have a solid or intermittent ABS light on. They routed the ABS sensor wiring harness so that it may contact the tie rod end you wind up with the ABS light on. The touching wears away the insulation and causes an intermittent or constant ABS light on. Testing is difficult because the fault may not show unless the suspension is moved up or down. Before you or your mechanic jump … Read More


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