The GM 6.5 used several different models over the years. Most common is the GM-1 and GM-4 used on the 92-95 models followed by the GM-5 and GM-8 used on the 96-2000 models. Vans typically used the GM-6 center mount unit. Identification is via a tag on the compressor housing or also a visual of how the wastegate is mounted. If you are having trouble identifying which unit you have feel free to drop me an email.
Requires core deposit of $300 which is released when core is returned. Cores need to be returned within 30 days or will be billed as non refundable unless other arrangements are made.