Complete tool list?

[Hipster]

I've personally only used it on Ford stuff. TFI module, coil screws, and a couple random body panel fasteners.

Ford ignition module 5.5 crapsman check, um, no, 5.5 thinwall, back on the tool truck again. lol

 

[HotWheelsBurban]

Trim, heater core (as @skylark mentioned), distributor cap nuts (OK, a Philips works too), I can't remember if the ICM in the distributor uses it too. But there's a few all around. And NO, IT'S NOT A FORD-ISM, LOL.

Blower motor screws on some 400s 95 up. That's all I've seen 5.5mm on,but it's not on all Burbs. May be a plant difference? Haven't removed or replaced some of the things Skylark mentioned. But my vortec distributor cap and rotor screws are T20 Torx. Then again, the fan nut on the water pump shaft is 35mm on my current Burb, think the other one was 36mm. Both 5.7 vortecs, built in Silao. So there are differences even in similar trucks.....
One of the tool sets I would keep in a truck would be whatever you have to use to change the serpentine belt, tensioner and idler pulley. Together with the spare belt and other parts if you have them. Then it's all there ready to use if needed.
I've also seen that a lot of the exterior engine stuff can be handled with metric sockets and wrenches from 7mm to 15mm. Some things are different, but again, see what you need to work on your truck.

 

[Erik the Awful]

Good to hear GM isn't the only ones using weird sizes.

No, it's not good. We need to start kicking these engineers in the junk until they start standardizing sizes like the Japanese do. Give me a Japanese car and an 8, 10, 12, 14, 17, and 19 mm wrenches and I'll have the thing nearly disassembled by lunchtime.

 

[PlayingWithTBI]

Give me a Japanese car and an 8, 10, 12, 14, 17, and 19 mm wrenches

What, no 13mm?

 

[PlayingWithTBI]

But my vortec distributor cap and rotor screws are T20 Torx

That's the difference between Vortec and TBI, my cap is 5.5mm. Sometimes I think GM should have changed platforms in 96 from GMT400 to maybe GMT420 or something like that, ha ha.

 

[Supercharged111]

Ford ignition module 5.5 crapsman check, um, no, 5.5 thinwall, back on the tool truck again. lol

I had to grind mine down to a thin wall to get it to fit.

 

[Nad_Yvalhosert]

I wouldn't waste your time on a dedicated 5.5mm. Use a 7/32 instead

 

[Hipster]

I had to grind mine down to a thin wall to get it to fit.

Makin' tools is a whole nother category. lol

 

[Erik the Awful]

What, no 13mm?

Doh! Yeah, for the battery cable.

 

[351FUN]

Don't forget that pesky E5 torx deepwell on the ignition switch.

I just replaced my ignition switch and didn't need any torx, so add in that different trucks have different needs