you have engine misfire see if valve cover is leaking oil into spark plug valleys or bad ignition coil or ign. wire

Replace the anarkis pressure module.

It depends some. You might be able to clean the rusted "socket" with a battery terminal cleaner brush and be OK, but some vehicles, not sure about this one, has a circuit board if it is in the rear. You did not say front or rear. So either it is a new turn signal socket OR it is a new tail lamp circuit board. It might just have a socket in the rear also.

Should have lines marked on for min and max.

Several sources; try the local library, local auto parts stores, or the many on-line auto parts websites for the repair instructions. You can try these websites; www.AutoMD.com for the 'How-To-Guides, feature, as well as; www.autozone.com for the repair steps.

First step - remove the rear wiper arm (pries off using flat blade screwdriver and rag to protect the paint finish), and then take the nut off of the post that the arm attaches to.
Next; raise the rear door (lift hatch). Remove the interior handle. Remove the interior trim panel - these usually just pry off carefully from the interior door frame. Sometimes there are a series of screws around the outside edges.
Then, you can get at the bolts that hold the wiper motor onto the tailgate. Be sure to unplug / disconnect the wiper motor electrical connection.
Try the many on-line auto parts sources, such as; www.autopartswarehouse.com or www.rockauto.com for the replacement parts.
They (Rock Auto) list the rear wiper motor for around $78.00 for your vehicle.

First step - remove the rear wiper arm (pries off using flat blade screwdriver and rag to protect the paint finish), and then take the nut off of the post that the arm attaches to.
Next; raise the rear door (lift hatch). Remove the interior handle. Remove the interior trim panel - these usually just pry off carefully from the interior door frame. Sometimes there are a series of screws around the outside edges.
Then, you can get at the bolts that hold the wiper motor onto the tailgate. Be sure to unplug / disconnect the wiper motor electrical connection.
Try the many on-line auto parts sources, such as; www.autopartswarehouse.com or www.rockauto.com for the replacement parts.
They (Rock Auto) list the rear wiper motor for around $78.00 for your vehicle.

First step - clean out the washer nozzles using a straight pin. Next, disconnect and remove the washer hoses to blow compressed air through. Do this step for each length of hose all the way back to the washer fluid reservoir. Total cost thus far = zero, nada. Put everything back together and test the washer system.

How did you check to make sure it has a full charge ? Check and make sure the battery cables are CLEAN and tight . If they are dirty power can't get to or from the battery . That hard black coating on the battery post needs cleaned off too . The post and cables should be nice and shiney .

GM has a little feature whereas when the heater blower motor of the vehicle stops working in low and medium speeds, then it needs to be replaced. Its kind of an early warning type of thing letting you know that its on its way out.

Be sure the drive belt is aligned, the belt tensioner is in good shape, and make sure the alternator purchased is new - not rebuilt. Stick with the brand name alternators; Remy and AC Delco, for example.

Try the many on-line auto parts sources, such as; www.autopartswarehouse.com or www.rockauto.com for the replacement alternator. For example, they (Rock Auto) list the new AC Delco unit for around $127.00 for your vehicle.

Look for a brand new one and stop getting remanufactered. http://www.autopartswarehouse.com/ Also do what Jimm has suggested.