V 3500 P/U 4WD V8-350 5.7L VIN M 4-bbl (1987)
![background image](/gmc/v_3500_p/u_4wd/v8-350_5.7l_vin_m_4-bbl/Page-529001.png)
Firing Order: Specifications
Ignition Firing Order
Spark Plug Wire Routing
Firing Order .................................................................................................................................................................................................. 1-8-4-3-6-5-7-2