Top 10 2003 Pontiac Bonneville Questions & Answers

I just repaired one not long ago.It was a 2001 with heated seats.The first thing you can do is switch the switches to see if the problem moves to the other seat.There are at least three little heaters attached to the foam,that is bonded to the leather.One had a broken wire,the other two [that I know of in the base] tested good.Seems they all have to be working,so everyone must be tested for continuity,with out being pluged in to the others.The only way to see whats going on is to somewhat remove the leather from the seat. With extreme care I was able to get more wire out of the heater and soldier it back on.Then used silicone or 3m window welder around[I don't remember wich] to protect it as that is how it kind of it from the factory. It looked like the wire broke at the edge of the protective part due to sitting on the seat too many times. Bad design,to hold up over time.

could be low fuel , low coolant temp , high coolant temp , low oil pressure , low voltage , high voltage , have a mechanic put a scanner on it make sure all is normal , might have false warning

hold reset button for about 10 seconds. your tire pressure would reset

There is another fuse box under the back seat that has the fuse for the interior lights. I have the same problem. I keep replacing fuses but they keep blowing. I don't know what to do.

There is a TSB (Technical Service Bulletin) for this problem, consult GM for more info. It simply regards the wiper module cover assembly that has been problem atic in most gm vehicles. Your best bet though would be to remove the cover and look for any signs of moisture intrusion, or broken circuts. If you find a broken circut and are handy with a solidering iron, you may be able to fix this problem. If there is any evidence of moisture, you may want to try to dry the unit out and see if that makes any difference. Normally though this problem ends in replacinjg the complete wiper module cover assembly. Here is where that item is located.

Accessory drive belt routing —3.8L (VIN K) engine



Accessory drive belt routing —3.8L (VIN 1) engine

I am having the same issue with my 2003 bonneville. Changed out the control switch, no difference. Changed out wiper motor, still no difference. Seems that the problem may be on the wire for the delay. There is a constand 2.5 voltage when the switch is in the off position, cause the wipers to run intermitently. The wipers will run more often if you rev the car engine and increase the trace voltage. A wire is going to be added to bypass the bad wire in the harness. Crossing my fingers, hope this works.

yellow handle at the back of the motor

Were is the blower motor located in a 04 bonneville and what would I need to replace it

how do i put air in my air shocks on 2000 sle bonneville