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  1. bigfootchiro

    921 LED Bulbs

    Not sure if this has been covered before. I know everyone tends to use 194 LED bulbs to replace their interior courtesy lights, but I replaced all of mine, including the doors, with 921 LED bulbs. Definitely larger, and much brighter. Had to trim some housings a little, but it worked! I will try...
  2. bigfootchiro

    AC Relay Stuck ON

    Hey guys! Long time since I posted asking for advice. Just as the title says, my AC relay, per the scanner data, shows that the AC relay is being commanded ON at all times. No matter if I unplug all sensors, unplug relay switch in engine fuse box, swapped out blower resistor motor and all...
  3. bigfootchiro

    1999 Vortec 350 and 4L60e part out

    Alright guys, the engine has a lot of newer parts, like 906HD heads, sensors, MPFI, etc, but believe it spun a bearing. Trans ran perfectly fine when pulled, as well, and has some internal upgrades (I never looked inside, but supposedly has around 60K since rebuild, and has at least a shift...
  4. bigfootchiro

    Hard Shifting 4L80e After Warmup

    Alright guys, so she starts shifting hard after warmup, but doesn’t do it all of the time. During this video, and the rest of the way home, it would hard shift every gear, and would lockup the TC too fast. So much so that the moment it shifts into 4th, it’s as if the TC is locking up with the...
  5. bigfootchiro

    Small Journal 327 Complete, $2500

    Helping a local guy out. He built this engine for a customer and they abandoned it. It is a race/weekend engine, not a DD. Motor is usually over $6000, but he’s letting it go for $2500. Let me know if you or anyone you know is interested!
  6. bigfootchiro

    Unfortunately, it’s time... 1999 4dr Tahoe 4x4 $1500

    Well, the time has come... I’m finally fed up, because I don’t have the time, nor the resources, to figure out what’s going on... you can find links to my posts about the tapping sound that I can’t figure out. Back story: Truck just had a fresh top end rebuild with 906HD heads and many new...
  7. bigfootchiro

    Latest Video on Engine Knock

    Alright guys, here we go! Limped the Hoe from Palm Springs to Largo. Made it 130 miles, and this happened. Couple things to note... it would have a very difficult time locking up the torque converter, so transmission temps would go up to around 210 at times. If TC did lock up, it would misfire...
  8. bigfootchiro

    Passlock/Security “Mystery” May Be Solved!!!

    I will update this later, but I may have just solved the mystery (or big potential) to these passlock/fuel deterrent issues! I’m excited, but extremely busy, so started this thread to remind myself to post later!
  9. bigfootchiro

    Complete 4L60E with NP246 and Torque Converter, 50K miles

    Came out of a wrecked 1999 Tahoe. I’ve kept it as a spare, but don’t need it anymore. Very clean! Has 50K miles on it! $1,000.
  10. bigfootchiro

    Truck shutoff while driving, won’t crank

    Truck just shut off going down the road! No warning or anything. Now the damn thing won’t turn over. You here the starter engage but doesn’t spin. Almost like it’s seized, but don’t know how. I pulled the valve covers and they had oil, so I’m assuming the rest of the block does too. Isn’t low on...
  11. bigfootchiro

    1999 Tahoe 2 Door Diesel- Craigslist Find

    Found this on Craigslist today for anyone who might be interested. You don't see many 2 door Hoes these days, let alone a diesel! https://miami.craigslist.org/brw/cto/d/1999-chevy-tahoe-diesel/6451920755.html
  12. bigfootchiro

    Blown head gasket/Cracked head/tired of mechanics

    I’ve had issues with the Hoe misfiring from the beginning. Took it to multiple mechanics that did work, even said the trans was bad. Come to find out, the misfire was causing trans to act up. After temporarily fixing the misfire, it ran fine for a while with occasional misfires. About a month...
  13. bigfootchiro

    May have blown transmission or TC today- suggestions on rebuilds

    So, like the title says, I have have blown the trans. Reason why I don't think I did is the trans still shifts firmly; however, on downshifts it's stuttering, plus is worse with TC lockup. Most problems are happening once TC locks up, plus it's not locking up on a consistent basis. Any advice on...
  14. bigfootchiro

    LS 6.0 LQ4 COMPLETE Engine 2005 Denali 120K SOLD

    Alright guys, going a different direction with my swap, but I’ll keep my build thread updated! Help me help you help me get my Duramax/Allison swap moving! 6.0L LQ4 Vortec from 2005 Yukon Denali with 120K miles. 335HP 375TQ. Running when pulled. Comes with all accessories AND wiring harness...
  15. bigfootchiro

    Limp mode? Starting in 2nd? TC locking in 1st?

    This has been happening for a while now. If I drop the trans into 1st and hammer the throttle, it almost IMMEDIATELY feels like it either shifts to 2nd (but doesn't feel like a shift), the TC locks up, or goes into limp mode. Acceleration is slow until it gets past a certain RPM. ALSO, if I have...
  16. bigfootchiro

    Vortec 454/4L80e HD swapped 1999 Tahoe OBS

    As suggested by @Tonyrodz , I'm going to do a build thread on my 99 Hoe. I've already done a few things, but I will start with the LS swap in this thread. So I've decided to pull the trigger and do a 6.0 swap. I've done research, but still have questions. First off, I'm going to keep the 4L60E...
  17. bigfootchiro

    LS 6.0 swap happening!

    So I've decided to pull the trigger and do a 6.0 swap. I've done research, but still have questions. First off, I'm going to keep the 4L60E that I have til it blows, then either build it further or swap a 4L80E (or a 5 spd upgrade). I'm not 100% sure what my trans is built with; however, the...
  18. bigfootchiro

    Any ideas on adjusting fuel pressure?

    After weeks of chasing down the gremlins, they have mostly been destroyed and the truck runs great! Still have a cylinder 4 misfire at idle that runs up to a 30+ count once warm, but other cylinders do not misfire at all at any RPM. When this first happened, the guy that worked on my Hoe said he...
  19. bigfootchiro

    Rough Idle, Multiple Misfires, Oily Injectors? Pics attached

    Today I decided to start over from square 1 with my misfire and pull the MPFI unit out and put a new one in, thinking that I may have screwed up the install somehow. When I pulled it out, the injector housings were very oily, and Cylinder #4 was especially brown which you can see in the pics...
  20. bigfootchiro

    What am I looking at?

    While still trying to track down misfires, I found this tube loose on top of the transmission. First is toward the driver rear of trans, may have been on top of t-case. Second picture is the end of the tube that I found toward the front passenger side on top of trans, just flopping around. Did...
  21. bigfootchiro

    P1351 one time before MPFI conversion, worse after (MISFIRE CYL 4)

    Need some help here. I've had an intermittent slow start issue for quite some time now. Would only do it on occasion after truck was warmed up. Did a leak-down test on Spider, and found a very slow leak. Decided to do the MPFI upgrade. On Friday, I got a P1351 with a no start after truck was...
  22. bigfootchiro

    Vortec Build- need more power!

    Hey everyone! Slowly Big Blue has been getting some much necessary attention to the motor. Runs like a top, but had to improve her performance some more. So far I have changed out the plugs for Iridiums (the old looked like the originals, no joke, extremely rusted), bought Taylor Wires 40 Ohm...
  23. bigfootchiro

    Designing an iPad dash install

    Hey y'all! Life has been crazy lately, but I'm back on the forum. I got this idea from someone else on the forum (can't remember who), but instead of a Double DIN, I'm doing an iPad install. I'm starting off with center console out of an early 2000s GM, like the one attached. Then I will move...
  24. bigfootchiro

    0411 Swap- Is the grass really greener on the other side?

    Hey everyone! I've been reading up on the 0411 swap and EFI Live, and I am contemplating this swap. I can get PCMs from my local junkyard for $30, and it seems as if they have a few 01-02 Express vans, and more Silverados. My first question is, what are the exact years and models that use the...
  25. bigfootchiro

    Back to the Chevy World!

    Hey guys! Proud new owner of a 1999 Tahoe that I bought this past weekend. Overall, it's in great shape, many upgrades, but definitely needs some work (mostly cosmetic and interior). I look forward to searching through these forums for ideas and picking everyone's brains!

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