K 1500 Suburban 4WD V8-393 6.5L DSL Turbo (1994)
1. Negative battery cable.
2. Connectors from PCM.
3. PCM mounting hardware.
4. PCM from passenger compartment.
5. PCM access cover.
6. PROM, using two fingers, grasp the PROM at both ends and lift it up out of the socket. Do NOT remove the cover of the PROM. Use of
unapproved PROM removal methods may cause damage to the PROM or socket.
7. Inspect for alignment notches of the PROM and carefully set it aside.
8. New PCM from its packaging. Check the service number to make sure it is the same as the defective PCM and remove the PROM access cover.
INSTALL OR CONNECT
1. PROM in PROM socket. Gently press down on PROM.
2. Access cover on PCM.
3. PCM in passenger compartment.
4. Connectors to PCM.
5. Negative battery cable.
FUNCTIONAL CHECK
1. Turn ignition "ON".
2. Enter diagnostics mode.
a. DTC 12 should flash three times (if no other DTCs are present). This indicates the PROM is installed properly, and the PCM is functioning.
b. If DTC 51 occurs, or if the MIL (Service Engine Soon) is "ON" constantly with no DTC(s), the PROM is not fully seated or is defective. If not
fully seated, press firmly on the ends of the PROM. If it is necessary to remove the PROM, follow the previous removal instructions.
