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    Reduced Engine Power notes

    Alright so I have been battling this issue with my cars ( 2003 Tahoe LT and Z71) for years now. I am writing this up to hopefully help someone else who is having similar issues with p1515 p1516 p0120 p2135 p0220 and all of the rest of the codes attributed to the fly-by-wire throttle system on...
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    Every other day something folks! Water pouring out of the HVAC vents over passenger seat driver side

    I had parked it on a slight incline on my driveway for a few hours during todays rain storm. I got in the car and as I put it in gear I heard the sound of slushing water. When I pulled out to flat ground, water came pouring out of the ceiling vents. Sigh... and Help! What is going on hear?
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    New shocks

    Hey all, I am a bit confused. I have a 2003 Z71. The web seems to indicate the same shocks for both the LT and Z71 model. This is hard to believe as I think the Z71 may need different shocks. Of all of us who are older and would like a little smoother ride, what would you all recommend. My...
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    Reduced Engine Power write-up

    Hello all. Thought this might help someone who has had this issue over and over again. The best write up I have seen... Hello all, For anyone reading this old post regarding the numerous years of Silverado's going into "reduced power mode" I will share my findings, hope this helps someone...
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    Hard shift from 1st to 2nd and more

    Hello all, I have about 210k miles on this 2003 Tahoe LT with the 5.3L engine. I have a hard shift from 1st to 2nd. There is a lot of info out there regarding this known issue that arises over time. But I am by no means understanding how these trannys work. I am going to drop the pan and...
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    At Idle, I get Reduced Engine Power

    Only happens at Idle speed or just as I come to a stop. I have wiggled all the pertinent wires and can't get it to repeat manually. I have replaced the TB connector and dealt with all the possible ground issues and just changed out the throttle body as well. Before throttle body replacement...
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    heated seats conversion

    Hello all. I currently have the basic seat in my Z71. No Lumber and no heated seats. Only up and down and forward and back electric set up. Found some with lumbar and heated seats. ( my back cant take it unless I have some lumbar support ) Anyone have any idea how to wire up the heated seats...
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    About 3500 Miles After Cylinder Head Replacement.

    Hello All! It is now about 3500 miles since the replacement of cracked 706 heads to 799 heads. Here is the Blackstone numbers for 3 different oil changes. I did rapid changes to clear out any debris or remnants from the work I did. Notice copper is not good and likely rod bearing issues...
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    Reduced Engine Power

    Over the years, I had to solve this problem and in fact I have for the most part. Every 1000 miles or so, out of nowhere, it goes off. Then I can just shut it down and it is fine again for many miles. Question is for the amazing knowledge base from amazing people here, how do you disconnect...
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    Parking brakes suddenly loose.

    Thank you all in advance. I replaced the parking brake shoes about 20k Miles ago. They have been great since. I tow a boat and when backing into the water, these brakes are essential as the I can't have the entire weight of the tow package and trailer on the transmission. That horrible...
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    $5.43/Gallon. Driving like Grandma from now on!

    I don't know about you guys but I am definitely driving to conserve gas these days. Just cruzing along so daintily. Yes I used the word daintily. :D Cheapest decent gas is at Costco and $5.43/gallon. Trying to keep my gas mileage around 16 per gallon which is pretty tough with 70/30...
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    1999 Yukon front left clunk sound

    Hello all! Well I have this knocking or clunking sound from the left front. It will make the sound when hitting a certain type of bump at speed AND even at idle speed as I go down my drive way slowly and the vehicle torques over the curb. No sensation in the steering wheel. At first I...
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    Rod bearing wear question

    This is a new off topic thread started based on cracked Castech 706 head and coolant in the oil. That great discussion about 706 heads is noted here... https://www.tahoeyukonforum.com/threads/2003-tahoe-coolant-system-leak-or-head-gasket-leak.132246/ Here is the notes from Blackstone...
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    2003 Tahoe coolant system leak or head gasket leak?

    Alright! Yet another coolant loss post. I have completely replaced the cooling system and I mean everything. Started losing fluid again shortly after. Put 20PSI pressure on the system and found a leak at one of the new tees at the firewall and the hose at the water pump. Tightened hose and...
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    FYI Parking Brakes

    I took my boat out about a week ago and noticed immediately that my parking brake was not holding well and I ended up leaning all that weight against the tranny. It worked perfectly a week prior. So got to work and check out the left rear parking brake compared to a new one. What happened to the...
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    Knock Sensors and more

    Noticed a lot of threads on this subject. If you all can help please, a couple of questions. I have the 5.3 engine on a 2003 Tahoe. Pretty sure I have one bad knock sensor. (P0332 and no continuity). So I am going to tear into it shortly. While I am in there I will be replacing the oil sender...
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    Jarring and harsh response to bumps and minor pot holes in the road

    Hello all... (again) Well my 99 Yukon is now almost perfect. Problem now is jarring and harsh bumps in the road. Question is this... I am going to do the lower control arms as they are warn. I have read that jarring could be weakened torsion bars. Should I change out the torsion bars while I...
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    High beams on and so are my low beams at the same time.

    Thought I would put out what I did to my 1999 Yukon to help others. It is great to have flood lights at night WITH BOTH HIGH BEAMS AND LOW BEAMS REMAINING ON. There are a number of ways to do this but utilizing a relay is best I believe. First and foremost, I purchased Xenon headlights ( low...
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    Please don't laugh... Quick Fix for a Oil Pan / Timing Cover oil leak

    I do not recommend this repair to anyone as I am not a mechanic and this could cause engine issues that I have no idea about! If you do wish to proceed, please proceed at your own risk as I did at my own risk! So as the title states, please don't laugh. I took the timing cover off and...
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    "Solved" Exhausted and dont know where to turn - vibration

    I have had multiple mechanics look at this and no one can pinpoint where the problem is. The drive shaft looks solid as well as the u-joints. They look newer and driveshaft appears to be replaced. ( I just bought this vehicle ) I have a whole body shake starting about 65 MPH and increasing as...
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    What shocks

    Hello again. I have the 4x4 SLT 1999 Yukon. I see many people putting on B6 Bilsteins on their 93 to 99 yukon. This is what I have currently and they are very rough riding. I am looking for a nice ride. Not rough as these appear to be. I was looking as KYB Excel-G Any suggestions or...
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    Can't bleed the system? Or something?

    Sooooo! Here is what I had to do. Major leak at timing cover. I took it down and replaced the cover and while it was off, I replaced the water pump as well and the small hoses attached to it. Nice and clean. I let the cover RTV ( room temperature vulcanizing) set for 24 hours. Started it...
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    "Solved" Hot wire

    I need a good heavy fuse positive wire at the hitch. Going to run a relay off the reverse lights and install bright back up lights. Dont want to drag a hot wire from the front to the back to do it. Will the door lock button at the hatch do it? This is for a 1999 GMC Yukon. Thanks much for...
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    What year and model?

    Need your opinion. I have a 2003 Tahoe z71 now. Want to upgrade to a newer vehicle. Looking for more power to tow a heavier boat along with a better ride and camera features too. Ltz I suppose. What year and model would u all suggest. I have dialed in my 2003 and have no issues with it at all...
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    Weird Coolant Issue

    I have a 2003 Tahoe LT. When vehicle is at operating temp and after some driving, the fluid level will drop to a point where my "low Coolant Level" light comes on. Then when I turn off the engine, the level comes slowly right back to the normal middle again. Do I have leak? Anyone have this...

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