The 2007 GMC Sierra is a reliable and powerful truck, but it does have its share of issues that owners and potential buyers should be aware of. This guide breaks down the 2007 GMC Sierra problems into easy-to-understand points, highlighting the most common concerns that have been reported over the years.
1. Excessive Oil Consumption
One of the most significant 2007 GMC Sierra problems is excessive oil consumption. This issue can creep up unexpectedly, often revealing itself around 36,000 miles. Owners have reported that the engine burns oil at a higher rate than usual, leading to frequent top-ups and potential long-term engine damage if not monitored closely.
Key Signs:
- Frequent need for oil top-ups
- Reduced engine performance
- Unusual noises coming from the engine
2. Transmission Troubles
Transmission issues are another major concern for the 2007 GMC Sierra. Owners have noted problems such as slipping gears, hard shifts, and even complete transmission failure. These problems often arise around the 100,000-mile mark and can be costly to repair, averaging around $2,700.
Key Indicators:
- Difficulty shifting gears
- Transmission slipping or not engaging properly
- Grinding noises during gear shifts
3. Heating and Air Conditioning Issues
Many Sierra owners have experienced problems with the heating and air conditioning systems, particularly with the temperature control. The root cause is often a faulty actuator, which controls the mix of hot and cold air. This issue can lead to uncomfortable cabin conditions and usually appears after the truck has been on the road for a while.
What to Watch For:
- Inconsistent cabin temperature
- Unresponsive temperature controls
- Unusual sounds from the HVAC system
4. Faulty Fuel Level Sensor
A malfunctioning fuel level sensor is another common problem with this model year. When this sensor fails, it can result in inaccurate fuel readings, which is not only inconvenient but could also lead to running out of gas unexpectedly. This issue tends to show up after 127,000 miles and usually requires a replacement of both the sensor and sometimes the fuel pump.
Symptoms Include:
- Erratic fuel gauge readings
- Sudden drops in fuel level
- Difficulty in estimating remaining fuel
5. Steering Issues
Some 2007 GMC Sierra owners have reported a clunking noise coming from the steering column, which can be alarming. This noise is often due to a problem with the upper intermediate steering shaft. While it’s more of an annoyance than a safety concern, it’s still something that might require attention, especially if it becomes persistent.
Signs of Trouble:
- Clunking noises when turning the steering wheel
- Vibration or looseness in the steering column
- Difficulty in steering control
6. Electrical System Glitches
Electrical problems, particularly with the gauge cluster, have also been reported by many Sierra owners. Issues like inaccurate speedometer readings and other dashboard gauges malfunctioning can occur, which might require a costly fix or even a complete replacement of the cluster.
Watch Out For:
- Erratic dashboard readings
- Inconsistent speedometer behavior
- Warning lights appearing without cause
