not sure but i do know Pontiac changed the design of the timing covers and water pumps in 1970 for cooling purposes,on the 400.but they didnt come out with the 455 till that year i believe.i know what your talking about because i made the mistake of puting a1970 timing cover on my 68 Bonneville and i have to change it back.if the timing covers are the same you can take the one off the 400 and use that but i don't know if they are the same.
Turn the pulley around on the shaft and see if that makes things fit better.You are correct the 455 was introduced in 1970. The 11 bolt water pump was introduced in 1969 to replace the 8 bolt previous pumps. You must change the timing cover and water pump together as the earlier and later styles will not work together. You would need the water pump, timing cover from the 1968 400. -Bonn-evil
Have vehicle scanned to determine the problem
I HAD A 1990 BONNEVILLE I HAD THE SAME PROBLEM WITH.IT TURNED OUT TO BE THE CRANK SENSOR.ITS BEHIND THE HARMONIC BALANCER. HOPE THIS HELPS
You could have a short from the controlls to the fan
I just had the same problem on my 99 bonnie I found a bad plug wire, so I replaced all the wires and plugs now runs grear now. Hope this helps.
This is an internal transmission problem and could have several causes. Transmission needs to be replaced or rebuilt. There are a good amount of used ones on the market for reasonable prices. Get one with a parts and labor warranty.
I had this problem on a 94 Bonneville after we had fixed the brakes. After I disconnected the battery and reconnected the light went off and the dinging stopped. Not sure if this was related or just coincidence.
See the answer to 2000 Bonneville Neutral Safety Switch Location. Had the same problem and that was my fix. You can install a separate Start Button in the Starter circuit to start the car also.
Could be a broken belt in one of your radial tires. Have them "spin balanced" to see it this is the problem.
i have the same problem. do not waist any money on sensors, i have replaced all the sensors and wires, what it is, is the thing that shifts your transmission, your car is taking off in high gear, my car takes off really slow which is a 1992 Pontiac Bonneville SE, and do not drive it until it is fixed, or you will end up putting a new transmission in to it.
camshaft or crankshaft sensor, or fuel injector circuit problem! This is from the actron code scanner book.
I had this problem with my 1994 Bonneville SE. would try checking the transmission fluid level(that was the problem with mine). If the transmission fluid level is where it's supposed to be then it could be that the transmission is going out or you may need to check the torque converter. I think that can also cause the problem.
The best place I've found to get your brakes replaced is the local muffler man. Any type of smaller garage in your area will be able to take care of your brake problem at a fraction of the cost of taking it to the Pontiac dealership.