PerformanceTrucks.net Forums

08 sierra 2500 6.0 upgrades/Maintenance

1di0tic — Tue, 09 Jun 2026 00:40:10 GMT

2008 GMC Sierra 2500 6.0 LY6
4 door, short bed.
200K.

AI helped me build my part list. Let's see how bad I did.

TSP Stage 3 Low Lift Truck Cam
Speed Engineering:
1� long tubes, Catless Y-pipe, and 3⅓ inch single exhaust.
Large OEM aluminum radiator with electronic fans
Cai for fun

I plan on having the heads gone through and springs upgraded, timing Chain. Probably do water pump, oil pump, barbell, lower O-ring.

I think I need the VVT delete. But AI keeps giving me mixed messages.

I'm hoping to hear back from someone who's actually done it with some budget friendly instructions. I know it's not going to be a race truck. Aiming for semi rowdy toy hauler/grocery getter.

Decal

Patrick05 — Sat, 06 Jun 2026 22:23:54 GMT

Years ago I thought I bought a decal from this site, but can�t seem to locate it and may have just been crazy, who knows. It was a �Because racetruck.� Decal in white letters. Anyone know where to get another?

2000 Silverado alternator question

robbieroflcopter — Sat, 06 Jun 2026 21:43:04 GMT

Greetings! I've got a weird issue with my truck charging system. I've gone through a couple of alternator in the last year. Now, even with a new one it won't charge. I have 11.9v on the trigger wire when the truck is running with the batteries at 12.1v. It seems as though the truck is not triggering the alternator. I understand the ecm controls the alternator with that one wire and supplies a voltage that determines how much current the alternator should put out? What do I need to feed that wire to trigger the alternator to charge? I've read both 5v and 12v through a resistor. I ran 12v to the c terminal and that didn't seem to trigger it like I've read elsewhere. Thoughts?

Smooth Exterior Door Handles for Chevy Silverado2004 CCSB

LOBO2 — Sat, 06 Jun 2026 01:22:53 GMT

I have a 2004 Silverado CCSB Z71. It came with the textured exterior door handles. Any suggestions on where to find new or replacement smooth paintable exterior door handles. Mine only has the hole for the key on the drivers side.

My painter said to also get new gaskets. I didn�t know anything about the gaskets.

Can I just get the gaskets from a Chevy dealer?

If so then I�ll just get a used set of door handles from EBay.

Thanks.

60'

ZO6Ted — Thu, 04 Jun 2026 22:44:27 GMT

Little update. Well I'm working on my 60 foot to try to get this heavy bitch into the 11's b4 more hp.5800 lbs rw. I've only got n 1 80 with stock suspension spinning the fronts with too much lift. My dragy was 7.75 at 92.12 on an incredibly great day on the street with Nitto 305x50x20's Next step, my son-in-law turned me on too Twisted Metal Workz in Canada for double adjustable Viking coilovers for my 2020. These guys have been very helpful. Lowered the front ~ 1.5" but it required control arms unfortunately and doing the rear right now with Calvert racing mono Leafs and traction bars for about 3.5 in the back. I'm not a suspension genius I checked with everyone and this is all I came up with. After I see what my 60-ft times are I'll be installing my forced injection intercooler so I can have winter air for my 2650. I've seen it lose a hundred horsepower or more based on Wallace racing calculator from winter to summer and I'm hoping to get those times way down afterwards. Soon as I do that I'll be biting the bullet and going with probably a Texas Speed 416 or 427. I know this is stupid I have two RC's that are at least 800 lb lighter and would be much easier but this damn truck is just so comfortable and the stereo is so awesome and rides like a Cadillac. Total sleeper except it's kind of loud but you know how that goes just look like an idiot with a loud truck. And then there's that 600 wheel ZL1 that I smoked in the 8th mile on the street after giving him the hit. Stock RaptorR's are my lunch...

Admin? Step inside please.

Speedfreak_Cody — Thu, 04 Jun 2026 11:26:12 GMT

Who's an admin on the site? Having a hard time looking at who is who. Got a question I'd like to PM you about, nothing serious or anything.

Opinions on future plans

jamesx17x — Thu, 04 Jun 2026 07:38:14 GMT

I currently have a LM7 5.3
stock bottom end
862 heads
214/222 .550/.550 108 cam
1 3/4 longtube headers
50lb flex fuel injectors
cold air intake
3.43 stock gears

I recently picked up a pair of 799s heads that I�m going to send to get milled and ported by Texas speed , im thinking 60cc chambers and .040 head gaskets 2.02 1.57 valves

im also switching to a NNBS intake with a bigger throttle body 90mm

either 4.10/4.56 gears
the truck is a regular cab short bed Silverado on
265/40r22s

part of me wants to go bigger cam, either a:
228/232 .629/.600 108 or
228/232 585/.585 112
or to keep my valve train happy
228/232 .550/.550 110

I know the bigger the cam the less bottom end I�ll have
just wanting some guidance and advice if throwing on some ported and milled 799s , NNBS intake , 4.10/4.56 gears will wake up the current cam 214/222 .550 108 enough to not want a bigger cam later on

also noting that my end goal is a built 408 with a 2.3/2.9 whipple supercharger but this plan is for way in the future

appreciate the help thanks

Corsa muffler and headers

WS64Mula — Tue, 02 Jun 2026 20:16:10 GMT

Good afternoon yall. I have a 6.2 truck with the Corsa sport #14866. It sounds great. I'm thinking about doing headers with cats on there. Has anyone started with the Corsa on the their truck and added headers with cats afterwards? I do know cats do help with sound control. If so, did it get louder or just a little deeper on the sound? I don't want it to be obnoxious. Would putting a resonator on there keep it about where it is now. Thanks in advance.

Ben

Qa1

Chevyss909 — Sun, 31 May 2026 04:33:29 GMT

Anyone have the hookup with qa1 looking to get some front suspension parts. Thanks

Street Scene Urethane Side Skirts for 2008 SILVERADO SC

RNC0305 — Fri, 29 May 2026 16:25:36 GMT

WTB Street Scene Urethane Side Skirts for 2007-2013 SILVERADO 1500 - 950-70170

2003 Silverado SS body kit for sale

hrlyhnx — Fri, 29 May 2026 14:19:36 GMT

I'm parting out my SS. OEM Body kit for sale $2,500 OBO
interior compete charcoal gray $1500 OBO
Glass....I have all with no cracks for sale as well
engine and calipers sold already

I'm north of Chicago about 20 minutes

Classic Truck/Car Rollcall

TXsilverado — Thu, 28 May 2026 21:19:00 GMT

We know about all of the 99+ trucks. Who else has a classic to show off? Here's my old turd. SBC, 700R4, 8.8 rear with 3.73 gears. cammed, longtubes, Sniper EFI. Slow LOL

Summit Racing's "ROADTRIP" Promo

Summitracing — Tue, 26 May 2026 15:25:03 GMT

Get your build moving with our "ROADTRIP" promo. Save $20 off $250, $40 off $500, and $80 off $1,000. Enter code "ROADTRIP" at checkout on SUMMITRACING.COM or mention it during text, live chat, or phone orders. Hurry, this offer ends at 11:59 PM EST on Wednesday, May 27. Exclusions apply, see details here.

Grab the parts you need and get your ride road-ready for the season.

I did it, 9's in my street truck!

Speedfreak_Cody — Tue, 26 May 2026 11:50:52 GMT

Fist pass out on the new set up went 9's, 3 consecutive 9 second passes at that. This is a daily driven full weight legit street truck. Weighs about 4500-4600 lbs with me in it. Still has air conditioning and touch screen apple car play radio lol. LQ4 block and crank, gen 4 rods and pistons. Ported 799 heads, BTR .660" springs, LSXceleration 226/230 .625"/.625" 114+4 cam, TBSS intake/LS3 TB, VS Racing 80/96, Huron Speed T6 kit, dual Magnafuel 4303 pumps, Bosch 210 injectors, Holley Terminator x max ecu, Mickey Thompson ET street radial pro's, 315/60r15. Stock 4L80E with a TransGo HD2 kit, Circle D 252mm converter with 4800 stall speed, 3.90 gears with a TrueTrac diff.

Brand New FIC 850 CC 48mm Injectors

91RS — Mon, 25 May 2026 10:49:21 GMT

I have a brand new set of FIC 850 CC 48mm length injectors. These are showing to fit LSA, LS3, LS7, LS9, and LS2 but please confirm based on your application as I’m not responsible for incorrect fitment.

$600 shipped.