It takes whatever it needs to run a full system check, no set time. However if you go to a local shop then only hook up to the ALDL for 98 and newer vehicles. That's what I do with my 97 pickup.
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--==RPM Resto & Custom==--
1989 IROC-Z Media Coverage:
Chevy High Performance - Readers Rides 4/03
GM High Tech Performance - Tech Article 3/06
Chevy Rumble - Tech & Feature Articles November 2006
Auto Restorer Magazine - Feature Article 5/11
SkinAndSteel.com
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