1998 Cadillac DeVille Questions

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I have a 98 Cadillac Deville with a Northstar motor. It has been running hot. I changed the thermostat, and water pump but it is still running hot. My check engine light is on and these are the codes diagnostic tool r...
the codes are - chech engine , service steering systen , lost siglal from bcm , abs light on and codes po151-po174 and traction control light. and the horn keeps blowing so i took the relay out and switched it with an...
I am attempting to jump the car using a charger. When I connect the negative clamp to a non painted bolt on the car the horn starts honking. Will it stop after a few honks or is there another method I need to employ? ...
and when sitting still at idel it hot then the other problem is the car surges while driving and sitting still
How do you replace an egr valve