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Hi - there are several potential problems that would create the "no shift to 2nd" behavior you are experiencing. First - check all fuses for the transmission - shifting is electronic on your 4L80E transmission. If your speedometer is not...

One of the number one causes for rattling noises on an automobile while driving would be a loose heat shield on the exhaust. These heat shields are made of thin sheet metal and are intended to prevent excess heat from...

The shifter cable connects the interior gear selector to the transmission. This allows the driver to select the correct gear. If the cable is detached, the gear selector will just flop around but not select any gear, as you describe....

The presence of coolant suggests a leak and that should be resolved as a leak could be a cause of the misfiring if water creates a path to ground. If, by chance, you are referring to coolant actually in the...

Hi there. It looks as if you've checked multiple components except for the the starter or starter relay. In most cases, like you've described, the issue of not being able to crank an engine over is caused by a bad...

You may have a bad spark plug or ignition coil and will need to have the computer tested for misfires. If you get misfire codes it will identify what cylinder is misfiring and will need to replace the plugs and...

Hi, thanks for your question. I'd be happy to help. You can do test your fuel pump shut off switch two different ways. The first is using a test light or volt meter back probe connector on one pink wire...

The Engine Power is Reduced message can appear on your driver information center (DIC). The DIC displays this alert when your engine is operating with reduced power. It is safe to drive your vehicle when this alert is displayed, though...

Hello. From what you describe, it would appear that your vehicle may be experiencing more than one issue. Oil on the spark plugs can be caused by a few different things. If you also found oil in the spark plug...

Hi there. The fittings that you removed attach to the cooler that is on the inside of the radiator for the automatic transmission. When you remove these fittings the cooler can fall back into the radiator and this eventually causes...

The Owner''s Manual for your vehicle states on page 5-16: "Do NOT add anything to the oil. The recommended oils with the starburst symbol that meet GM Standard GM6094M are all you need for good performance and engine protection." I...

Based on your description, I do not think that the vehicle was placed in neutral before the tow took place. If the vehicle is all wheel drive, this likely caused severe damage to the rear axle and possibly the transmission....

My suggestion is to have the vehicle towed to another shop that you choose for a second opinion. Make sure it is not a shop he suggests and don't tell him where you are taking it. Typically, flywheels are indexed...

If you are going on a trip, then have a different mechanic check the system to make sure you do not have a problem with the anti-lock brakes. The brake pads would not have caused any of these lights to...

Hi there. The forward clutch and the reverse input clutch are slipping before engaging. This can be caused by the fluid being dirty, a dirty oil filter, broken input shaft seals, or sticking valves in the valve body (transmission brain)....

Hi there. P0700 is set when the PCM detects a malfunction in the transmission control system. This malfunction causes the vehicle to set a Check Engine Light and trigger a failsafe mode. Once the failsafe mode is set it will...

From the description you have provided, your vehicle's cooling system thermostat may be stuck closed. The cooling system thermostat is designed to quickly bring the engine up to operating temperature. If stuck closed, the result would be the engine overheating...

Hello. Most of the time if the OD is not working it is because the computer has locked it out. This occurs if the vehicles control module detects and issue within the transmission so it locks out this gear. The...

You might want to try watching my video "How to Fix a Car That Idles Poorly." You just take the plastic plenum that goes from the air filter to the intake and get some throttle body cleaner. Spray the throttle...

Depending on how long the radiator cap was off for, this may have cause the coolant to leak or evaporate resulting in the engine overheating. If this continued for a period of time long enough, this may have caused a...

Diagnostic Trouble Code P0017 has many causes other than a failed position sensor. For example, the valve timing could be off if the timing chain has jumped, there could be oil flow problems to the phaser from incorrect oil viscosity...

Hi there. Anytime you replace the cylinder heads, and internal engine components, it is highly recommended to ensure they connect correctly with lower engine components; such as the crankshaft. This is the job of the timing chain. It's also possible...

I think the most likely cause of this issue would be a blown intake manifold gasket. I would recommend having your engine smoke tested to determine if any smoke comes out of the place you believe the coolant is leaking....

It sounds like you have a bad Mass Air Flow (MAF) sensor if you can disconnect the MAF sensor, having it running, and can drive it. Especially in this case of having some drive symptoms but it acting better disconnected....

Your engine will not run good and my stall at idle with no PCV system or valve working as it should. If you need to drive a couple miles to get the parts needed then plug the vacuum side of...