20 Most Recent 2005 GMC Envoy - Page 5 Questions & Answers

use a thread gauge to get the pitch of the thread ( threads per inch) measure the diameter of the o2 sensor and get a thread tap from a ool shop to match some are BSP thread which is a taper so be careful that you do not remove any more metal than is necessary from the thread

Check catalytic converters. Loosen the exhaust pipe or remove the pre O2 sensors.

When engine is idling the oil pressure sign can come up and that is OK. However if you've noticed that gauge shows much lower oil pressure that a bad sign. Show it to knowledgeable mechanic (but don't be lured in the engine replacement; ask for a root cause - it may be oil receiver or oil pump). Also I hope there's no oil puddles under the car? What about oil level?

located on the passenger side rear of motor were the engine bolts to the transmission.

Usually a hard brake pedal is the brake booster. Since you replaced that it is out f the picture (unless the replacement was bad). This issue of the pedal going to the floor is troublesome and potentially dangerous. If it is not doing it all the time, it probably soon will. What most likely occurred, and this happens quite often, is that after having had the hoses and calipers replaced, it was necessary to bleed the brake system of air in order to get proper brake operation. This requires depressing the brake pedal numerous times to the floor while purging air from the system. There is a potential problem in this and that problem is that the o-rings in the master cylinder can be damaged by the bleeding process, because the normal stroke of the master cylinder is much shorter than the one used during bleeding. This sometimes results in o-ring damage because the master cylinder bore may have worn a ridge in it where the normal stroke ends. The repeated passing of the o-rings over the ridge will damage them and can cause them to fail. When this happens the pedal will drop to the floor. You really can't blame the mechanic for this but it most likely happened as a result of the work done. Have the master cylinder replaced ASAP. I wouldn't recommend using the vehicle at all in the meantime.. it is a pedal-press away form total brake failure at any given moment.

The float is in the gas tank. Difficult fix. Probably have to replace it.

Which connector are you refering to?

Check your motor mounts, common problem. Also check the transmission mounts.

Need to know what code pops up with the check engine light, some autoparts stores will check for free. Don't drive it if the check engine light starts flashing rapidly.

It goes in order, from the front is # 1, against the firewall is # 6 for the I6 engine.

Who is "they"? There should be an error code and if dealer was "they" It's more than likely correct. However, It sounds to me like you have some wires shorting. or cross wired relay. Has anyone done any work on the car recently? If so take it back if this began happening shortly after the work was done. If it was self help, Tripple check your work.

First you should realize there are no such thing. This should also be a very good clue that it's beyond your area of expertise.

YouTube!

Did you push the brake's??

Probably the fan belt needs to be replaced.

no idea ,look at the thickness of the bolts and this will give you some idea ,if your really particular like some jaguar owners i know then put some contact adhesive on the threads then pinch them down with a rachet and then a jerk ,which should give you about 2 bar or 40lbs do not overtighten as this is worse than under tightnening ,if you snap a bolt ??

It's probably your speed sensors or your whole speedometer cluster