Kevin: Are pre-55 Canadian GMC trucks popsitive ground like their USA brothers?

Originally Posted by Gdads51
It's likely an exact match for the same years/models GMC trucks IMO.

Dan: Different part number between Chevy and GMC may be because of negative (Chevy) vs positive (GMC) ground. Motor would still run, just in the opposite direction. Given the back and forth action of the output of the wiper motor assembly, I don't know it it would make any difference.

'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.