SKU: JD04125
Trim level and powertrain change the numbers that matter: torque specs, wiring, fluid capacities, part numbers. A generic P4500 guide gets you close. This is the documentation for your exact 1987 GMC P4500 P4T042, not a nearby approximation.
The 1987 GMC P4500 P4T042, 3.4L (L634T-A) Turbocharged DIESEL, has its own OEM-Authorized documentation set. Jayda pulls it from GMC's source: component locations, diagnostic procedures, wiring schematics, labor times, fluid specifications, OEM part numbers, torque specs, TSBs, and recall information specific to this configuration.
The right procedure for this P4500. Not a platform approximation.
All 12 OEM data features included with Pro Tech, grouped by how you'd actually use them.
