[wafrederick]

The 1996 and up is worse when changing the waterpump.GM made worse than the 1995 and down to change the water pump.The timing cover has to come off when replacing the water pump.Do not let one jump time,the valves bend and is about a thousand dollars for machine work on the head.I hate Quad 4s,GM should quit making parts for them.You do not turn a 1996 and up Quad 4 backwards or you will bend the valves if you do.Turn the crank as you are tightening a bolt.The Quad 4 is not cheap to fix,very expensive to fix and used Quad 4's are not easy to find.You will pay $1,200.00 and up for an used engine,1996 and up.