Recent content by thx1138v2

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    1996 5.7 / Intermittent loses power-Bogs down. Died twice at StopLight. Starts right up and runs fine mostly

    That's good to know. I hadn't had any problems with my '94 so the problem wasn't with the '07 at all but with the battery. It would stall, stutter, etc. even while driving.
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    1996 5.7 / Intermittent loses power-Bogs down. Died twice at StopLight. Starts right up and runs fine mostly

    I just bought another truck after crashing my previous '94 Sierra. It's a 2007 Sierra with only 108K miles on a 4.3L engine. It's a completely different truck from what you have but the symptoms are amazing close to what you are reporting. My '94 had an OBD I system so reading the codes didn't...
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    Heated o2 conversion wiring

    You know about "assume" correct? Especially on wiring.
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    Coolant questions

    IMO, the 180F thermostat is too cold. It will run OK but its going to cost you in gasoline. I did a chart on the coolant temperatures some time ago. It's posted below. The thing to keep in mind is that water boils at 212F but you won't be running only water since the water is diluted with...
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    Can’t seem to get all air out of rad

    You could have a leak between manifold water port and the exterior of the engine. I had that problem once and the water/coolant never showed up on the driveway. The leak was above the water pump where the manifold had a leak to the outside of the head but there was a catchment cast into the top...
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    P0441 Code

    Considering the age of the vehicle it most likely is a bad Evap Purge valve. This may cover it: https://www.700r4transmissionhq.com/p0441-chevy-suburban/
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    ‘92 5.7 tbi stalls after tach goes crazy

    Check your cable connections to the battery. Disconnect and clean them. Also the wire that goes to the alternator. If you see any corrosion at the battery terminals, cut the insulation parallel to the wire and peal it back a bit to see if the corrosion has crept into the cable. If so, replace...
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    No crank/heatsoak issue

    I had the same problem but it turned out to be the starter solenoid
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    5W30 or 10W30, synthetic or traditional? Opinions wanted

    The advice I got from a mechanic friend was to use the same type of oil that was used to break in the engine, i.e. synthetic or conventional and once you hit 120K miles use the high mileage oil in a weight that suits your normal environment temperature wise. So I use conventional 10W40 in...
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    AC Compressor

    Your low pressure side sensor is probably failing to have enough pressure. There is a switch, typically on the accumulator, that will open so the clutch does not engage and tear the compressor up when the pressure in the system is too low. If that's the case, you won't be able to measure any...
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    Buy a Single Spark plug wire?

    For future problems: save the bad plug wire and throw it on the ground under the truck. I own some rural property and run into this problem occasionally. The problem is that the rat will grab it and run off with it from time to time. That's why I save the entire old set when I change them now...
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    Wanting to buy a GMT400, how old is too old, and years to avoid? (discussion)

    I have a '94 I bought new off the lot. It's a 4.3L V6 Fleet truck with 250,000 miles on it. No razzle dazzle, just a plain Jane truck. 4.3L engine, 4L60e transmission, GU6 - 3.42:1 differential, AC, Radio. The down side is it is getting old and even the junk yards only hold them for so long so...
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    Which Harmonic Balancer?

    "So there's this possibility--maybe even a probability--that the "vibration" you're feeling is the engine not running right, rather than a failed damper." That got me thinking of a problem I had many, many years ago with the coil on a Pontiac. Once I started looking from that perspective I...
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    Which Harmonic Balancer?

    Wouldn't that set a code and/or give me a CEL?
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    Which Harmonic Balancer?

    No, I did not unbolt the converter. I just checked that the mount was present and tight. I had the trasmission rebuilt back in 2004 or 2005 but I haven't had any problems with it so far. Of course that was 17 years ago so I guess that could be it. I've got the harmonic balancer ordered. I think...
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