hey everone keeps sayin that 99's are "dogs" but my freind who i bought my truck off of .. he went to iraq and hadto sell it so i bought it off him... well anyway hes back now and he found another 99 and he says that mine was faster than the one he has now. i dunno what the deal is but does anyone else not have a "dog" 99????
1999 GMC Sierra black reg cab short bed SLE Z71 5.3 <--CARDOMAIN PICS
NELSON 93 hot tune, 02 PCM, VOLANT Ram air intake, MSD wires, ACdelco iridium plugs , Edelbrock ceramic shorty headers, jegs off-road y pipe, Dynamax int pipe, 3" Magnaflow Exhaust with turndown, EGR removal, throttle body bypass, vette servo, long servo pin, performance 4th apply piston, B&M shift kit, SLP 160* thermostat, LS1 Fans, NELSON harness, ported and polished throttle body (did it myself, for free lol)..... _______? cam is next as soon as i stop spending all my money
They definately are not as slow with tuning, but before it wasnt that bad. The 01-02's are much faster, but 99's are the slowest of the bunch. I am getting my 02 PCM in tomorrow, that is supposed to cure most of the false knock problem and speed it up a alot!
Chris
2009 Silverado, HPTuners, all stock.
99's had a different cam and smaller injectors than any other year. And a crappy PCM that loves to pull timing.
-Jared
why does everyone want an 02 pcm for their 99??? whats the difference between the 01 and 02 pcm's?
old mod list: H/C/I/N/E/G 408
new mod list: 5.3, gears/posi, mufler and tune : (
The '01 and '02 PCMs are the same. The reason to replace the '99 PCM is because the '99 & '00 PCM's were prone to retarding timing due to false knock. The newcomer PCM's are much better.Originally posted by TXsilverado@May 12 2005, 01:05 AM
why does everyone want an 02 pcm for their 99??? whats the difference between the 01 and 02 pcm's?
No more trucks, but this is what I used to have. 2000 GMC Sierra, 6.0L-LQ4, Built 4L60, LS6 Cam, The Other Guys Headers, 3 inch exhaust and 7 chamber flowmaster, 43lb injectors, Nelson Tuning, Drop - 3/4 McGaughys Spindles, Bell Tech Shackles & Hangers. Best time 13.59 @ 106
Got my 02 PCM in yesterday and can defiantely tell there was much more power in that thing! I still think it could stand a bit more timing, but that will come later.
chris
2009 Silverado, HPTuners, all stock.
Yup, 99s stock can barely get out of their own way. The biggest thing for them is the tune, makes a HUGE difference. I was amazed how much better my '01 ran STOCK as opposed to my '99 did with bolt ons.Originally posted by 99Silver5.3@May 12 2005, 12:46 AM
99's had a different cam and smaller injectors than any other year. And a crappy PCM that loves to pull timing.
The superior man is modest in his speech, but exceeds in his actions. - Confucius
"He who asks of life nothing but the improvement of his own nature, is less liable than anyone else to miss and waste life."- Henri Frederic Amiel
'01 Chev Z71 LT - '85 BMW 745i TURBO - '88 BMW 750iL - '88 Ford F150 XLT Lariat - '79 MB 240D - '79 MB 280S Euro
'80 MB 380SE-5.0 Euro - '85 MB 300SD - '87 MB 300SDL - 1990 MB 300SEL - '91 MB 300SE - '91 MB 560SEL
Let's face it, the red hair... makes 'em wet.
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