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kipps · 05-16-2019, 08:23 PM

Looking at this 1988 manual, here it's specifically showing the R/V(squarebody) trucks. Am I reading this correct, that the first number is a circuit number, and the second number is a square mm cross-section?

If so, I can cross-reference that size number and come up with a AWG size. Link here.

Reading those five wires in the middle of the screen, I come up with 22, 12, 12, 12, and 18 gauge respectively. Is this the correct way of interpreting it? Why did GM not list that 22 gauge wire according to its metric equivalent?

Another unrelated question. Did GM ever install a factory trailer plug or brake unit in the squarebody trucks, or was it just up to the owner to set up his truck for pulling a trailer?

05-16-2019, 08:23 PM	#1
kipps Registered User Join Date: Jul 2014 Location: North-central Virginia Posts: 1,099	Wire gauge question Looking at this 1988 manual, here it's specifically showing the R/V(squarebody) trucks. Am I reading this correct, that the first number is a circuit number, and the second number is a square mm cross-section? If so, I can cross-reference that size number and come up with a AWG size. Link here. Reading those five wires in the middle of the screen, I come up with 22, 12, 12, 12, and 18 gauge respectively. Is this the correct way of interpreting it? Why did GM not list that 22 gauge wire according to its metric equivalent? Another unrelated question. Did GM ever install a factory trailer plug or brake unit in the squarebody trucks, or was it just up to the owner to set up his truck for pulling a trailer? Attached Images __________________ 1987 C6P V20 truck, 2010 LMG 5.3, AFM delete, 2010 Camaro exhaust manifolds, 1997 nv4500, 1991 np241c, hydroboost, 2005 14bff axle & driveshaft, drop-n-lock gooseneck, 4.10 gears, stock suspension, rims, and tires. Still a work in progress. Any questions or suggestions are welcome! Last edited by kipps; 05-16-2019 at 08:29 PM.