Partial VIN on Chevy truck frames, in two spots.
No VIN on GMC truck frames.
Rear trailing arms/coils, standard equipment, on Chevy trucks...rear leafs, optional equipment.
Rear leaf springs, standard equipment, on GMC trucks...rear trailing arms/coils, optional equipment.
All dash clusters have red lenses with Tandem Lock & Over Speed screened into them with a position & cone, in the cluster. A piece of tape is applied over the back housing at these two positions on the light-duty trucks, to prevent light from bleeding through from the back & from the light sockets from being plugged into the wrong position. The medium-duty & heavy-duty trucks would have a dedicated plug incorporated into the dash harness, to occupy these positions. If your directionals light up these positions, the sockets are misplaced or the harness has been modified.
