20 Most Recent 1997 Cadillac DeVille - Page 9 Questions & Answers

listen to tenioner and idler pulleys for bearing going/are bad also check all belt driven components for bearing/noise

test igntion lock cylinder for broken wires

REMOVE PANEL, UNHOOK MOTOR AND REMOVE 3 10MM NUTS PULL MOTOR FROM REGULATOR. NOTE TAKE OLD MOTOR WITH YOU TO MATCH REPLACEMENT

CHECK FUEL LEVEL SENOR AND WIRING TO PZM (BCM)

Lean bank 1and bank 2, possible vacuum leak , restricted fuel filter or low fuel pressure.

Coolant flows from engine thru upper hose to radiator and out thru lower hose to water pump.

be looking at the headlight switch..or fuseable link wires..

take the horn fuse out read your manual it will tell you where is located.

You mean the resistor pellet on the key itself ?.
No, there is no other way to start it, you need to have the pellet on your key, it is part of the security system.

I'm afraid you need a new key.

Diagnostic Test Code (DTC) P1645 is described by the vehicle manufacturer as "EVAP Purge Solenoid Output Circuit".