GM Service Manual Online
For 1990-2009 cars only

Drive Type/Model

Service Allowed

Service Preferred

Z Height

4.6V8/3.6V6

29-49 mm (1.14-1.93 in)

39 mm (1.54 in)

D Height

4.6V8/3.6V6

54-74 mm (2.13-2.91 in)

64 mm (2.52 in)