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    DOD Delete Theory

    My theory on this is that the altered profile of the DOD lobes results in too little lift for the DOD cylinders when the non DOD lifters are installed; reducing the lift & duration on those cylinders which reduces the volume of air that is available for the compression stroke. So, you have...
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    Spark Plugs keep fouling & P0172 code

    Restriction in the air intake system. Maybe foreign material or oem component loose or able to move and restrict air flow and move again to clear air way. Remove everything and wiggle test. Clear opening to fender well. Run vehicle with air filter and or housing removed if possible.
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    2002 denali front diff failure/vibration

    Looks like you have already checked or replaced the common failure items. So, maybe check the welds where the diferential mount are welded to the frame and all the frame welds. The front suspension may have to be loaded normally. Tires on ground type loads. So jack up the vehicle and sit the...
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    2004 Yukon 2500 4x4 front bumper exchange with a 2011 gmc 2500?

    OEM bumpers, not likely. Aftermarket bumbers, maybe. I have never seen an OEM bumper for OEM winch, but that dont mean anything because both front eyes are dim and I only got hind sight.
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    No Hazard Lights and No High-Beam Lights - HELP?

    Simplify the circuit. IF positive switched circuit: 12volts...plug in connections...switch...relays...load...ground connection. If negative switched circuit: 12 volts...connections...load...switch....ground connection. The high beam elements could have failed anytime. load test each bulb...
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    Ignition on engine off fuel pump pressure

    On cold starts. Key to run position, the fuel pump should operate of about 20 seconds then stop. If you have 20 lbs pressure, the pump has run and timed out and will not run until ecm senses oil pressure or the key is cycle off and back to run. Check for spark at the spark plug, if no spark...
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    LM7 head upgrade

    yes if you like the additional performance, use all the time.
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    Engine issues

    What about reviewing the cel codes and data stream? These data are real results of the engine operating conditions. Information is allways good and usefull, but data rules. The cooling system has three main and common leakage paths. One is to atmosphere via the system fill cap and and...
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    Front shock bottom mount ( replace rubber bushing ? )

    Looks like the Oreilly's supply chain is about empty. Moog K6724 But Walmart offers them at 18.00
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    LM7 head upgrade

    You can use the tow/haul function for every day operation and the PCM will recalibrate (after a number of drive cycles,) the engine controls to reflect the new driving style. You can also use the tow/haul function make the Escalada feel like a Camry in light to light driving.
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    Charge controler generator

    I foget your year model, but I am thinking that the ECM/PCM controls voltage to the field coil, therefore controlling alternator output. And a battery with internal shorts/opens intermittently will cause eratic voltage output. And other circuits shorting and then loosing contact can also make...
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    05 Yukon xl Denali p1516 and brake issue

    Why not investigate the causes of the P1516 code?
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    05 Yukon xl Denali p1516 and brake issue

    The P1516 Chevy DTC indicates a potential issue with the TAC module. This code suggests that there is a malfunction or a communication problem between the TAC module and the Engine Control Module (ECM), which is responsible for managing various engine functions.
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    2004 Denali Climate control is only hot or cold

    I encountered a 05 Suburban several years ago with those conditions and discovered the aspirator above the driver position was not functioning. Actually the wires had been clipped by someone. Two butt splices restored Hvac operation.
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    CEL came on yesterday, 2006 ODB trouble codes

    The one on your engine has the boss for a manual gage line. None of the plates leak with correct gasket in good condition.
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    CEL came on yesterday, 2006 ODB trouble codes

    If you are going to replace the OEM block off plate this ICT one, I want to purchase the OEM plate. I will send a USPS money order plus shipping . PM me with your mailing address.
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    2004 Yukon- Oil pressure gauge at zero, but no check engine light

    The oil pressure sending unit failure is common cause of gage reading zero and without the Low Oil Pressure alarm. If oil level is near normal. The unit may be located at the rear of the intake manifold where distributors were located on the orginal small block chevrolet engines.
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    2004 Yukon XL whistle with belt off

    Fuel trims at engine idle speed will asist in identifying intake leaks. High pitched sounds may be generated when exhaust gasses escape at the exhaust manifold gasket or cracks in the exhaust manifold, etc.
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    Aftermarket source for torsion bars

    698 views and no one responded yes.
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    Why don’t my batteries last !!!!

    Search for "12v24v intelligent pulse repair charger." These are available on amaozon for under 30.00 and on other sellers for less that 20.00. I have two and use the repair function often on vehicles that may sit unused for a couple of months.
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    Repeated stalls

    If you within a 100 miles or so, I can probably schedule a day or so to show you the items to check.
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    Repeated stalls

    Sounds like some the electrical devices are loosing power during operation. Maybe get someone to verify and confirm the condition and capacity of electical conductors, connectors and wiring. Such as battery cables, connections and load test. Plug in connectors, ground connections and crimps...
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    Lift/Roll Pan

    Is the license plate mounted in the center of the roll pan? If so, you can use a flip down plate holder from 93 caprice or such.
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    2005 GMC Yukon xl

    Buy it, maintain it, keep it rust free, enjoy it. Nothing better availalble. period
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    Vehicle theft system

    Time to call the locksmith.

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