PerformanceTrucks.net Forums

Left Power Door Mirror Position Detent Not Holding 2005 Silverado

therock — Mon, 18 May 2026 18:34:33 GMT

The detent to allow the mirror to fold if hit is very loose. As loose its held in position I'm surprised it does not fold at 25mph but it holds at 80mph until I hit a rough bridge joint or patch.
Has anyone gotten into one of these and restored the holding force?

Thanks

Aluminum intake gaskets

BIG_KID — Sun, 17 May 2026 01:00:43 GMT

Will the aluminum style intake gaskets fit with the Magnuson MP112 supercharger. Picture for reference. Thanks�.

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60-130 Dragy runs?

Speedfreak_Cody — Mon, 11 May 2026 14:38:27 GMT

Just seeing who all uses a Dragy in here. I'm a big fan of 1/8 and 1/4 dig racing and that's really what my truck is more set up for, but doing some 60-130 runs on the street helps me dial in my tune pretty good. Here's my best so far, had some good cool morning air and awesome DA on my way to work that day.

Hello

lakasee — Sun, 10 May 2026 12:35:55 GMT

Happy Sunday all

Hi

lakasee — Thu, 07 May 2026 22:29:39 GMT

How's everyone doing. I'm new on here. from California.

Looking for a fast intake

Obskid95 — Thu, 07 May 2026 13:33:31 GMT

I�m looking for a fast lsxrt 92 or 102 intake

new transcooler 03 Savana 1500 195K miles unknow service history

thebrain — Tue, 05 May 2026 15:43:57 GMT

new transcooler 03 Savana 1500 195K miles unknow service history
planning to use this van as primary tow vehicle, even though the 04 express 3500 has the 6 litre engine
this RV van weights in at just over (empty holding tanks) 8100LBs she tows good but I believe the lighter 1500 will a better option, plus I can see out the rear windows for backing up.
I can backup looking out the driver window for getting lined up then the mirror for completing the back up but am used to just looking out rear window the 3500 RV van has curtains an also peeking tom prevention one way perforated window film.the 1500 only has factory tinted windows.

note I haven't towed in over 6 years of upsiddown world.
here's the oil trans fuild that dripped out the radiator appears burnt but does have a tad of redness image.

plan to pump out an replenish w/ new nurcon6 an replace filter.

new trans cooler front image the trans return line is on bottom not sure if I have it backwards or if it makes a differnce sense the aux cooler feed line is much lower that the radiators feed line?

rear note bypassing the rad. note the fuel injector type clamps (much stronger than (worm gear hose clamps are for wennies),opposite side of orginal flared tube.

prior to cooler install the fluid appeared clean an red on the dipstick otherwise I would have pumped out before cooler install dam.

auxillary cooler 26,000 lbs 15 1/2 x 10 x 3/4 Transmission Oil Cooler kit. image

______________

2003 Silverado 2500HD tune

Joseph223 — Tue, 05 May 2026 03:24:24 GMT

I have a 2003 Silverado 2500HD with the 6.0 and NV4500. I got my HP tuner today and copied my 2004 GMC Savannah 2500HD rev limiter onto my truck so it�ll bounce and not just cut the fuel. I�m just wondering what do I need to do to squeeze out the max power I can before I do a cam and heads because it�ll probably be a while before I do that. It does have aftermarket wiseco pistons that did raise the compression a little bit
Edit: forgot to mention I want to eliminate the throttle lag as it is a drive by wire

Rear O2 sensor question

jimmys5600 — Sat, 02 May 2026 00:12:35 GMT

Hi All, Considering replacing the rear oxygen sensors on my 14 Silverado with the 5.3 flex.
Looking up GM part numbers (#126547188) mentions it needs to be programmed?
I don't understand that. Can anyone assist me on this please?

Thank You

08 5.3L issue after cam and tune

Poot — Fri, 01 May 2026 04:06:29 GMT

I recently cammed my 5.3 and just got it back from the tuner and I'm not impressed... just need some advice if its just me or tuning issues as I don't know a whole lot when it comes to tuning or cams. I have a 08 5.3 that I just did a decent amount of motor work on. I got it back from the tuner and on the ride home I noticed it pushing thru the brakes pretty decently (which i heard is somewhat normal), Idle cranked up to about 900 or so and bounces to around 1200 in gear (so high it doesn't really lope just sounds like I'm holding it open), neutral automatically kicks the idle to 2k-3k so if I hop in N at a light I essentially neutral dump it. It also feels insanely sluggish compared to stock so I'm bummed. Dyno sheet says 298hp and 295ft-lbs. I'll be even more bummed if I just put all of this money and effort in just to make stock numbers and not so great drivability. Deal with it? Take it back? Could it be mechanical? Any insight would be much appreciated! Here's what I got done:

Howards Cams Rattler Camshafts 198035-09, 275/282, Lift .525/.525 109 LSA,

Delphi LS7 Lifters, LS2 trays, Speed engineering 1� long tubes,

Speed engineering Y Pipe, Full 3in Stainless exhaust w/ Borla atak,

BTR LS 7.400" Chromoly Pushrods - 5/16" Diameter, 080" Wall,

BTR.560" Lift LS6 Beehive Valve Springs w/Hat Seals,

4.56 Rear diff, 315/70r17 tires

Built trans, to my knowledge stock converter

Suggestions for 450-500HP build

Joseph223 — Wed, 29 Apr 2026 04:25:44 GMT

I�m looking for suggestions on a 450-500 HP build for my 6.0. It had lost compression almost a year ago and I did a piston job on it. What I want to do now if make it close to 500 HP. My current parts is a comp cam, a set of 799 heads, 8.1L injectors, an HP Tuner, and possibly some shorty headers if I can see any benefit from them. It currently has wiseco pistons in it
the cam I plan on running is a Comp Cam XFI RPM Cam 54-412-11 the specs are
Advertised Duration 265/271, Lift .522/.529
I plan on reusing the lifters and push rods since the engine only has 160,000 miles and they haven�t been making noise. Since it is my daily I don�t want a race cam because like I just stated it�s my daily and I use it for towing so I want more low end power and torque

Engine Swap odd transmission noise

branedge — Tue, 28 Apr 2026 17:40:42 GMT

199 GMC Sierra 1500
5.7 vortec
4L60E trans

Just swapped engine in my Dad's truck that has been sitting for a couple years the transmission was fine when engine was blown and truck was parked. I replaced the engine, flex plate, torque converter. in the linked video below the truck is in Reverse and when i say "ok" it get put in Park. it makes this noise in R,D,3,2,1 but not in P or N. it will drive (drove it down my driveway and back)

thanks for looking

Magnuson MP112 pulleys

BIG_KID — Tue, 28 Apr 2026 00:05:37 GMT

I have this adapter from SCOL and wondering what type pulleys fit it. Thanks

Violently Slamming into Gear

.Omerta — Mon, 27 Apr 2026 20:12:42 GMT

I recently got a 2000 Chevy 1500 with a cammed 5.3. Unsure of the trans or if it has a stall converter matched for the cam. I got in it the other day and shifted into drive and it slammed into gear and made a banging noise in the rear differential. It drives smooth, shifts smoothly until I turn at a light where its idle is low. I can hear the rear differential make that banging sound. I�ve taken the bed off to diagnose it and the banging is definitely coming from the diff. But why? Why is it so hard? Thanks in advance!