If you’ve found oil on your GMC Sonoma’s spark plug, it should be a cause for concern. It doesn’t necessarily indicate a major engine problem. When there is oil on the spark plugs is usually caused by a bad valve cover gasket or O-Ring (overhead cam engines). There can be other causes as well. Any … Read more
If your GMC Sonoma is making a high pitched noise or hum, it could be a sign of a bad wheel bearing. There are several different vehicular components that can make a squeal or hum. That’s why it is important to know the other warning signs of a bad bearing before just going in and … Read more
Your GMC Sonoma’s braking system is the most important safety feature on the vehicle. If it does not work properly, it can put you in a situation where you can be injured or killed. There are quite a few different situations that can cause a caliper to stick. GMC Sonoma Brakes Sticking Symptoms Smell– … Read more
One of the most inconvenient vehicular problems is when the A/C won’t blow cold air. If your GMC Sonoma isn’t keeping you cool, we’ve outlined some of the most common reasons why this might be happening. It is entirely possible for your Sonoma’s heater to work just fine even when the air conditioner is blowing … Read more
A bad alternator can leave your GMC Sonoma without power and unable to move. Alternators don’t always go bad in the exact same way. We’ll cover the symptoms of when an alternator goes bad, and how to diagnose a bad one (which is really pretty easy). How Your Sonoma’s Alternator Works The alternator’s job … Read more
One of the most common (and) critical major engine problems is a blown head gasket. If your GMC Sonoma has blown a head gasket, you may find it running poorly or not at all. Below you’ll find the symptoms, causes, and price of a GMC Sonoma head gasket. Recognizing the signs of a blown head gasket in your … Read more
If you find your GMC Sonoma‘s steering wheel shakes or vibrates when you press the brakes, it is almost always the brake rotors that are the cause of the problem. There are plenty of other issues that can cause the steering wheel to wobble. But, if your Sonoma is only shaking when braking, that’s … Read more
An engine functions as a pump, requiring a precise combination of fuel, air, and spark. If any element of this trio is imbalanced, your GMC Sonoma won’t run right (or at all). While a misfire is the symptom of bad spark plugs, bad spark plugs almost always indicate a problem with the engine (more on … Read more
If your GMC Sonoma doesn’t start, you’ve found the right article. Many different issues can cause the problem. We cover all the likely ones in an order that makes sense when diagnosing the issue at home. This article is written with the assumption that you are looking for a way to get your GMC Sonoma … Read more
P0155 is a very common OBDII code that occurs in the GMC Sonoma. It is caused by a failure in one of the oxygen sensors heated elements, specifically bank 2 sensor 1. The purpose of the heated element in the oxygen sensor is to quickly bring your O2 sensor up to normal operating temperature after … Read more