GMC Sierra 1500 HD Valve Cover Gasket Replacement Costs

Estimate price near me

Service Location

Customer Ratings

Included for free with this service

Online Booking

Mechanic comes to you

12-month / 12k-mile warranty

Free 50 point safety inspection

Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.

See availability

Customer Ratings

Valve Cover Gasket Replacement Service

How much does a Valve Cover Gasket Replacement cost?

On average, the cost for a GMC Sierra 1500 HD Valve Cover Gasket Replacement is $236 with $40 for parts and $196 for labor. Prices may vary depending on your location.

Car	Service	Estimate	Shop/Dealer Price
2006 GMC Sierra 1500 HDV8-6.0L	Service typeValve Cover Gasket Replacement	Estimate$297.44	Shop/Dealer Price$322.59 - $386.70
2005 GMC Sierra 1500 HDV8-6.0L	Service typeValve Cover Gasket Replacement	Estimate$284.83	Shop/Dealer Price$307.50 - $369.76
2002 GMC Sierra 1500 HDV8-6.0L	Service typeValve Cover Gasket Replacement	Estimate$284.83	Shop/Dealer Price$307.54 - $369.82
2003 GMC Sierra 1500 HDV8-6.0L	Service typeValve Cover Gasket Replacement	Estimate$284.83	Shop/Dealer Price$307.54 - $369.82
2001 GMC Sierra 1500 HDV8-6.0L	Service typeValve Cover Gasket Replacement	Estimate$284.83	Shop/Dealer Price$309.60 - $373.43

Show example GMC Sierra 1500 HD Valve Cover Gasket Replacement prices

What is a valve cover gasket and how does it work?

Each cylinder head on your car’s engine has an aluminum or plastic valve cover bolted to it. Between this valve cover and the cylinder head, there is a gasket that keeps engine oil from leaking out. The valve cover bolts keep the gasket compressed, thus preventing leaks. Over time the gasket becomes brittle from the engine’s heat or the bolts loosen, creating an engine oil leak.

When to consider replacing a valve cover gasket?

Look for these signs of oil leakage at the valve cover gasket:

Oil seepage or dripping. Should the joint between the valve cover and the cylinder head fail, oil often becomes visible on the valve cover or cylinder heads. Usually, the oil will attract and hold dirt.
Oil accumulating inside the spark plug well. The spark plug tube seals are part of the valve cover sealing system. If the tube seals are leaking, you will see oil on the spark plugs or wires. The valve cover gasket and tube seals are all replaced at one time if either fails.
Oil leakage at the rubber grommets. The bolts holding the valve cover to the cylinder head sometimes have rubber grommet seals under the bolt heads. If these seals are leaking, you will see oil seepage around the bolt heads.

How do mechanics replace a valve cover gasket?

Remove engine cover. Some engines have plastic covers over the entire top. The plastic engine cover is removed to access the valve cover(s).
Remove components. On 4 cylinder engines, the valve cover is usually readily accessed once any electrical components and emission control tubing are removed, plus any accelerator linkages that might be in the way. On 6 or 8 cylinder engines, depending on which valve cover gasket is leaking, removal of the air intake plenum might be required, as well as additional steps.
Remove valve cover. Once the valve cover(s) is accessed, the cover retaining bolts are removed and the cover pulled off. The valve cover sealing surface is checked with a straight edge to be sure the cover is flat and thus reusable.
Install new gasket. The new valve cover gasket is applied along with new rubber grommets under the retaining bolt heads. If there are spark plug tube seals, these are replaced as well. In some applications, oil resistant RTV (room temperature vulcanization) sealant must be applied to specific segments of the sealing surface, along with the new gasket, to ensure a complete and effective seal. The cover is bolted back on, using a calibrated inch pound torque wrench, and all other components are restored to their original position.
Check for leaks. Finally, the car engine is run and a visual check is made for oil leaks.

Is it safe to drive with a valve cover gasket problem?

Yes, as long as the amount of oil leaking is small, and there is no leak onto hot engine parts such as the exhaust manifold, it is safe to drive your car until you have an opportunity to fix it.

If you notice oil leaking on to the ground beneath your car after it is parked, you do not have a small leak, and it needs to be found and repaired as soon as possible. Any leak, of course, means your oil level is dropping as you drive the car. If you have a leak, be sure to check your oil more frequently than usual so you do not run low on oil and damage the engine.

When replacing a valve cover gasket keep in mind:

The mechanical components of a car engine will typically outlive the gaskets used to seal the engine. However, many of these gaskets, including the valve cover gaskets, are relatively easy to replace.
Never add stop leak type products to engine oil or other vehicle fluids. Not only are these materials not approved or specified by the original equipment manufacturers, but they also can create additional problems that may be costly to repair.
Often, if a car is old enough to have a valve cover oil leak, there will be oil leaks elsewhere on the engine, so you should request a complete leak inspection. It may be more cost effective to repair multiple leaks during one service call.
Often, the PCV (Positive Crankcase Ventilation) valve is inserted into a rubber grommet in one of the valve covers. An old rubber grommet is a potential leak source, as well as connections to the PCV valve. These components should be inspected and considered for replacement while there is access to the valve cover.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee

Meet some of our expert GMC mechanics

Real customer reviews from GMC owners like you.

Excellent Rating

(5)

Rating Summary

5

0

0

0

0

5

0

0

0

0

SEE REVIEWS NEAR ME

Bryant

13 years of experience

638 reviews

Bryant

13 years of experience

by Keith

GMC Sierra 1500 HD V8-6.0L - Car AC Repair - Indianapolis, Indiana

Great Mechanic Knows his stuff Worth the cost

Scott

37 years of experience

995 reviews

Scott

37 years of experience

by Johnny

GMC Sierra 1500 HD V8-6.0L - Fan Clutch - Gilbert, Arizona

On time , fast clean work and great service.

Bryant

13 years of experience

638 reviews

Bryant

13 years of experience

by Keith

GMC Sierra 1500 HD V8-6.0L - AC Belt - Indianapolis, Indiana

Great mechanic really knows his stuff. Deserves his pay.

Lavell

29 years of experience

405 reviews

Lavell

29 years of experience

by Matt

GMC Sierra 1500 HD V8-6.0L - Check Engine Light is on Inspection - Orinda, California

Lavell was great, very knowledgeable and contextualized his findings so I could understand not just what he found, but also the corresponding implications.

Excellent Rating

(5)

Rating Summary

5

0

0

0

0

5

0

0

0

0

SEE REVIEWS NEAR ME

Recent articles & questions

P3446 OBD-II Trouble Code: Cylinder 6 Exhaust Valve Control Performance

P3446 means certain cylinders were shut down during specific driving conditions due to low oil pressure, faulty lifters or varied sensors.

P0151 OBD-II Trouble Code: O2 Sensor Circuit Low Voltage (Bank 2 Sensor 1)

P0151 code definition O2 Sensor Circuit Low Voltage (Bank 2 Sensor 1) What the P0151 code means P0151 is the OBD-II generic...

How to Take Off Window Tint

Window tint needs to be removed before it loses efficiency as a UV protectant and privacy screen. Read these 5 methods for removing it yourself.

How do I replace the battery on the master key?

Your Accord’s master key (the one with the built-in key fob and lock controls) needs a battery to operate. If you notice that it takes several presses of the button to get your doors to lock or unlock, it’s time...

Car not starting due to security code.

Hi there. This comes up frequently on this vehicle. The two most common problems that I have found that cause this is either a failure in the passlock sensor in the ignition lock cylinder, or the body control module has...

Loose battery terminal

A loose battery terminal can cause a whole host of issues from electrical malfunctions, voltage spikes, and in the worst case scenario, an engine compartment fire. The negative battery terminal needs to be disconnected, and the suspect loose terminal needs...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (844) 997-3624 · hi@yourmechanic.com