Service Manual- As with my '95 Z28, I bought the complete GM service manual set. No brainer. There is so much info here. Includes every model (1LE, ZL1, and Z/28 among others) and options. I believe the only place you can get it is from Helm (helminc.com).
ZL1 Belly Pan- When I started inquiring about a belly pan at my local GM dealership, I had the part #s for both the ZL1 and Z/28. There are differences between the two as the Z/28 (part # 23459995) has more openings for whatever reason. I placed my order for the Z/28 belly pan but my go to parts guy called a few weeks later to say GM was telling him it was temporarily unavailable
. He knows his stuff and we have a good rapport as he used to work with my dad. No parts restriction (he was aware of the Z/28 parts restrictions). So I ordered a 2014 ZL1 belly pan (part # 23188146), which has small cut outs near the cats. Originally the ZL1 pan did not have these cut outs and there was some reflective insulation in that area. GM made a change at some point so there are atleast 3 different belly pan part #s out there.
You must also get the square "nutserts" (need 11, part # 11570215) as I call them that install within the front subframe/cradle and bolts. Any competent GM dealer can get these for you ($$) but some hardware stores may carry the nutserts. And (4) large flanged bolts, part #11609982, (7) M6x1x25 bolts and (3) M6x1x33 bolts.
If I remember correctly,where the front of the belly pan meets the bumper cover (behind the splitter) I did have to drill some new holes for those new bolts/nuts, and lightly trim the bumper cover.
I also cut the rubber air dam to mimick the Z/28. The Z/28 just has two small rubber deflectors right in front of the front tires with the middle wide open as to let the air travel across the belly pan.
