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Home >> GMC >> 1998 >> C3500 HD 6.5 F, Automatic >> Repair and Diagnosis >> Electrical >> Starter >> Starting System >> On-Vehicle Testing >> Starter Draw Test (Diesel)

Starter Draw Test (Diesel)

  1. Disable fuel system. On diesel models, remove fuel pump relay, located in underhood fuse-relay center.
  2. Connect ammeter to negative battery cable. Crank engine and observe ammeter readings. If readings are more than 360 amps, repair or replace starter assembly. If readings are less than 300 amps, repair or replace battery cable or connections.