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Home >> GMC >> 1987 >> Forward Control 6.2 J, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 32 (Engine Controls - Remove/Install/Overhaul) >> Powertrain Control Module (Pcm) >> Programmable Read-Only Memory (Prom) >> Removal
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Programmable Read-Only Memory (Prom): Removal

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.
  1. Remove PCM from vehicle. See REMOVAL under CONTROL UNIT . Position PCM so bottom cover is facing upward. Remove slide-off PROM access cover by depressing locking tab.
  2. Using PROM removal tool, grasp PROM at narrow ends. Gently rock PROM from end to end while pulling up. If installing new PROM, remove old PROM from PROM carrier.
NOTE: Note reference notch locations in PROM, carrier and PCM for reassembly reference.
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