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V8-5.3L

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I've changed valve seals and all gaskets I'm getting gray smoke from tailpipe in 2000 Silverado
Gray smoke suggests burning oil but you can use a scan tool to look at fuel trims and see if perhaps rich operation is contributing to the problem as well. With regard to replacing the seals, if the valve guides...
Question
Radiator fan running max frequently
The fan circuit has a relay, switch contacts, and a temperature sensor. There may be other circuit components as well. If the fan is coming on when it is not supposed to, there is a fault in one or more...
Question
Reduced engine power
Hi There, A number of things may cause the reduced engine power light to come on, however a common symptom in your era Avalanche has been related to the throttle position sensor or in some cases the throttle body itself....
Question
I want bigger tires with stock suspension but dont know which is best.
Hello, thank you for writing in. Keep in mind suspension modification can wear your CV joints and other components prematurely. 285's are hard to make fit on your vehicle without getting excessive tire rubbing. Even with the modification to the...
Question
Hi I have a 07 impala 5.3 and I've been having an issue when I try to accelerate if I give it to much gas it starts to buck and he
Hi there. It sounds like you may have a low fuel pressure concern. A car can idle with low pressure, however when demand is placed on the system it will fail as in your case. The engine is possibly starving...
Question
Whenever I initially start braking over 25 mph I hear a metal clanking noise
The brake system and nearby components should be inspected. There has to be something noticeably loose to create that obvious of a noise on braking. Were a mechanic to look closely, he or she would undoubtedly find the issue as,...
Question
I have a 2002 chevy avalanche z71 it won't move forward in any gear,but it will move in reverse
Check to see if any diagnostic trouble codes have been stored in both the PCM and TCM. Check the fuses in the circuits that power the transmission controls. Occasionally, a short in a sensor such as an oxygen sensor will...
Question
2003 gmc sierra stalling
Hi there. Once running, the engine requires a constant flow of gasoline and good spark to keep that fuel igniting. If gasoline is not readily available, or if there is not enough spark, the engine will quit. More modern vehicles...
Question
Parasitic drain 2005 tahoe on ignition a fuse
Hello, thank you for writing in. Great job on the electrical testing thus far! A wiring diagram for the vehicle will work wonders for you if you can obtain one. If you are referring to the ignition switch fuse, then...
Question
Wondering if a person can replace a radiator hose themselves to save money or is that something that has to be replaced by shop
Hi there. Actually, it's best to have a professional mobile mechanic come to your location to replace the radiator hose. Most modern cars, trucks and SUV's have a cooling system that needs to be correctly primed anytime coolant is removed,...
Question
How much is a transmission service
What you are describing is often a sign of low transmission fluid or a faulty transmission control solenoid. As you know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car's computer...
Question
Car begins to roll when the shift lever is in park had only starts in the neutral position, just rebuilt the transmission
The neutral start safety switch could be misaligned or a fault in the linkage and./or cable could be contributing to the problem because "Park" is not actually reached when you move the shifter. The whole mechanism from the manual lever...
Question
bad o2 sensors
Diagnostic Trouble Codes can never be used to "directly" condemn parts. In the case of an oxygen sensor, the oxygen sensor output must be evaluated on a scope to determine if the sensor itself is bad or if you perhaps...
Question
I'm ready to buy a 2004 Chevy Silverado but chk engine light shows Knock Sensor. Also Oil Pan Leak, Fr Axle Seals Leak. Buy? Cost?
Hello Mike. You have found yourself in a position where there is a lot to consider, and the choice is going to come down to how much risk you are willing to take with this truck. Starting with the knock...
Question
My transmission makes a clicking sound when get on the gas what could this be?
Hi there. Usually a transmission does not make a clicking sound. In most cases, when a car is in gear and you hear a clicking sound that increases as the vehicle speed increases, it could be caused by an axle,...
Question
I changed my starter an battery an wen I go to start the truck the fuse keep popping
I sounds like you may have a short or potentially a bad starter relay. The problem should be one of 3 things. 1. Intermittent short in the red wire to the relay or in the brown wire to the starter...
Question
I need my catalytic converter replaced. I found out my truck requires a dealer only converter that's California compliant. Is this
Hi there. The folks at CARB (California Air Resource Board) have set emissions standards for California sold vehicles for several years; which includes specific catalytic converter design. So if a mechanic is telling you that you require a specific catalytic...
Question
why wont my `06 chevy tahoe shift into drive and go but when in park and shifted to reverse it will reverse?
Hi there. A car that refuses to shift or go into gear easily is trying to tell you something is wrong and in most cases the culprit is the clutch (in a manual transmission) or torque converter (in automatic transmission)....
Question
After changing transmission convertor seal on 2007 gmc yokon. The fluid come out after driving about 30 miles in distance. What
Hi there. In most cases when this occurs, it's due to a faulty installation of the converter seal (if it's backwards it can cause this issue), debris between the gasket and input shaft or the converter not being installed straight...
Question
How many hours total can I expect for H3 5.3v8 radiator replacement?
Hi there. It really depends on where the job is being completed and the mechanics experience, availability to parts and quality tools to complete this task. Typically a radiator replacement includes replacing the radiator, all sensors, cooling hoses and in...

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