GMC motorhome My nephew starts his 73 for the first time in 33 years

[@AlainHubert]

Fantastic! Back when GM made good, reliable engines.

[@73canyonlands]

So the high pitch squeal at the end is small leak from air bag controls. Cleaned up the points, bypassed the fuel tanks to a gas can, changed the oil with mobile 1 full synthetic. Started right up , was pretty thirsty for gas, couple pumps and it fires up.

[@gerry-p9x]

New gas and plugs and start fluids