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Old 05-19-2022, 04:04 PM   #3
James Lamb
Registered User
 
Join Date: Mar 2019
Location: Knoxville AL
Posts: 74
Re: 87-91 tbi suburban wiring diagrams

Does yours have a cable driven speedometer? My '89 Suburban was, although it was a diesel so maybe it was different. I had to buy an adapter that screws onto the transfer case, gives speed signal to the 4l60e I just put in, and also allows a mechanical connection for the speedometer cable.
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1989 Suburban 1500 4 x 4
1989 BMW 325i
1945 Willys MB Jeep
1959 Triumph TR3A
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