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DTC Code:

Manufacturer:

P1642

Maker: GM

Description: Vehicle Speed Output Circuit (Except 3.4L, 5.7L VINs P & 5 & 1998 3.8L)/Fan Control Relay 2 & 3 Control Circuit (5.7L VINs P & 5)/AIR Control Circuit (3.4L)/Change Oil Lamp Control Circuit (1998 3.1L Lumina & Monte Carlo)


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