Fitment notes: Diesel engine requires higher CCA; side post terminals standard on GM trucks
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Every control module on the 1988-1989 GMC K1500 — where it lives, replacement time, and what it takes to program a replacement. Modules marked dealer / factory tool won't work after a part swap alone — budget for programming.
Anti-Lock Brake System Control Module (EBCM)1.8 hr R&Rrelearn only +0.3 hr▸ programming details
📍 Left frame rail near master cylinder or under driver seat area
🔧 Tech 1
⚠️ Optional equipment (RPO JJ1). Rear-wheel ABS only (RWAL). Requires brake bleeding and system initialization after replacement.
Instrument Cluster (IPC)1.5 hr R&Rno coding
📍 Behind instrument panel, center of dash
⚠️ Primarily analog; electronic components are non-programmable.
📍 Right side of firewall, passenger side near blower motor
🔧 Tech 1 + PROM chip
⚠️ Physical PROM chip replacement required for calibration. TBI fuel injection standard on most engines by this point.
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 1989 GMC K1500 6.2L V8 and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years.