I've heard of the "Big 3" electrical upgrades but couldn't find anything about what alll three are. I know the alternator rewire is one of them, and I've done that. I believe one is the ground as well. When removing the carpet from my GP, I found where it grounds on the passenger side of the front seat. What are they all?

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2004 Impala SS - ZZP PCM, 3.4" Pulley, K&N CAI, TOG Headers, SLP Cat-Back, 180* thermo, Autolite 605s, PRJ Performance wires, Alternator rewire, GMPP Handling kit
2000 Grand Prix GT, Commuter Car - K&N CAI, GMPP Handling kit, ZZP downpipe w/U-bend delete, ZZP Plog, Alternator rewire

Alternator->battery positive
engine ground->chassis
battery ground->chassis

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2004 Impala LS - got some mods
NAIOA Moderator

Making you think twice before picking on Impalas

I know where the battery ground is, so that's not hard. But what part of the engine should I ground to the chassis? Anywhere special?

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2004 Impala SS - ZZP PCM, 3.4" Pulley, K&N CAI, TOG Headers, SLP Cat-Back, 180* thermo, Autolite 605s, PRJ Performance wires, Alternator rewire, GMPP Handling kit
2000 Grand Prix GT, Commuter Car - K&N CAI, GMPP Handling kit, ZZP downpipe w/U-bend delete, ZZP Plog, Alternator rewire

You can go from the alternator mounting bolt to the strut tower nut for that.

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04 Indy SS build #972
XP, TOG's, Lightning injectors, 2.8 pulley, 105 CC springs, Wizaired, 3.29 gears, tripleedgeperformance ported blower, machined LIM, 180* tstat, RS12YC@.053, FP rewire, Alt rewire, stage 1 V boost, PRJ wires, Stage 2 IC

The OEM wire runs from the battery, down along the front of the car, along the front part of the sub frame, over to a bolt on the bell housing of the tranny.

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Scotty Hall
Bartlesville, OK
2001 Pontiac Grand Prix GTP
It whines a lot, but I like it.

The only limitation you will ever face in life is yourself!