[Warren87_28_4x4]

Hey im thinkin about goin to look at a Jimmy for sale. What are the things to look for in teh serial num to tell if its a Vortec CPI or a TBI?
thanks

 

[92S10LB]

alrighty the 8th digit into the vin will either be
Z: tbi
or
W: cpi
but even so the visual difference is huge the tbi will look almost like a carb. and have a round air cleaner, the cpi or votec motor will have a large upper intake that doesnt resemble the tbi at all and it should say "vortec" on the top of it , hope that helps

 

[Warren87_28_4x4]

hey thanks alot. couple more questions
are all the CPIs Vortec? and when did they start makin the cpi?

 

[92S10LB]

yeah all the cpi's should be vortecs and i dont believe they made them till '93 possibly late '92.

 

[blueskyjack]

CPI

'92-95