Throttle Body (TBI): Identification
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 1994 GMC Vandura Special, 1994 GMC Vandura, 1994 GMC Rally Camper Special, 1994 GMC Rally, and 1994 GMC Forward Control. However, it is still accessible from the selected car via links, so may be relevant.
An 8-digit unit identification number is stamped on throttle body assembly. Number is stamped vertically on front of throttle body, at Throttle Position (TP) sensor side. Letter codes are stamped on throttle body at external tube locations to identify vacuum hose connections.