It does not have a Timing Belt. It has a chain, that needs no adjustment.
The water pump is the tensioner for the timing belt. if you need to adjust it, replace it.
It has a timing chain that should last the life of the engine.
A 2004 Buick does not have a speedometer cable. The speedometer signal comes from electronic sensors.
two
You DONT the ECM Electronic Control Modual does it for you...
Timing is not adjustable, the computer controlls all of that.
Timing chain......will last life of the vehicle. Chains are better than belts anytime.
Pimp My Ride - 2004 Jake's 1986 Buick Century 4-7 was released on: USA: 7 August 2005
Timing is not adjustable. The distributor or cam sensor is synched to the crankshaft sensor with a scan tool.
The air went under wiper arms at the back of the hood.
Disconet the battery for 15 minutes this will reset your oil change light
The light is on because there is a fault in the system. It would be best to have the professionals take a look at it.