A wiper blade that smears, a filter that's gone dark or a brake pad worn to the backing plate all start as a part number. Getting the right one is half the repair, and the other half is knowing which parts you can't afford to get wrong.
Holiday GMC works with two lines, GM Genuine Parts and ACDelco parts, and the parts department takes orders through the website. This guide walks through how to think about the choice, which parts earn extra attention on a truck that works for a living, and how to order without a wasted trip.
Quick answer: Holiday GMC in Graham works with GM Genuine Parts and ACDelco parts, and you can request what you need through the Order Parts page or by calling (940) 227-4212. Ask the team which line fits your vehicle and the job, and read the parts warranty terms before you buy.
What separates GM Genuine Parts from ACDelco parts?
The store lists both lines, and the honest answer is that the parts counter can tell you more than a blog post can. Which one fits depends on the part, the vehicle and what the repair has to do. A brake component, a battery and a cabin filter don't all follow the same rule.
What matters most is that the part is matched to your vehicle by the numbers, not by a guess. Give the advisor your model, the trim and ideally the VIN. That gets the fitment right the first time, and fitment is where most parts mistakes happen.
If cost is part of the decision, say so. Ask what the difference is between the two lines for the specific part, and ask what the warranty looks like for each. A fair answer comes with reasons you can repeat back.
fitment is where most parts mistakes happen

Which parts deserve the most attention on a truck?
Anything that touches stopping, seeing or starting. Brake parts come first, because a truck with a trailer asks more of them than a car does. Wiper blades come next, since a sudden downpour on TX 199 is a bad time to find out they've hardened. Batteries and filters round out the list.
Filters are easy to ignore and cheap to replace. An engine air filter clogged with dust from county roads makes the engine work harder, and a tired cabin filter is why the A/C smells stale. Ask to see the old one when it's changed, and you'll know how hard your routine is on the truck.
Brake parts deserve the longest conversation. Pads, rotors and hardware wear together, and replacing one without looking at the others can leave a truck pulling or noisy a month later. Ask the technician what the inspection showed, which pieces are being replaced and why, and what the stopping feel should be afterward. If the answer is vague, ask again until it isn't.
Take a photo of the old part and the label on it before you call. Pair that with the VIN and the parts team can usually identify the right one faster.
How do you order parts from Holiday GMC?
The simplest route is the website, with a phone call as a backup when the part is unusual. Have the vehicle details in front of you before you start.
Write down the model, trim and VIN, plus a short description of the part and where it sits on the vehicle.
Use the Order Parts page on the Holiday GMC site, or call (940) 227-4212 and ask for the parts department.
The parts team confirms the fitment and tells you whether the part is on hand or needs to be ordered.
Install it yourself, or book a visit so a technician does the work and checks the surrounding parts.
Parts hours run Monday from 9:00 AM to 5:45 PM and Tuesday through Friday from 9:00 AM to 5:30 PM. The department is closed on weekends, so a Saturday morning repair plan needs the part in hand by Friday.
If you're handy and plan to install the part yourself, say so when you order. The parts team can flag anything that usually needs a companion piece, such as a gasket, a clip or a fluid, so the job doesn't stall halfway on a Saturday afternoon with the shop closed.

What should you know about the parts warranty?
Warranty terms depend on the part, the line and how it was installed, so read them before you buy. The Parts Warranty page on the Holiday GMC site is the place to start, and the parts team can answer questions about a specific item.
Keep the receipt and the invoice from any repair. If a part fails early, those papers show the date, the part and who installed it. A tidy folder in the glovebox saves a long conversation later.
When should shocks and struts get a look?
Ride parts wear slowly, so the change sneaks up on you. A truck that used to settle quickly after a bump starts to bounce, or the front dives harder under braking. The struts and shocks explainer on the site covers how the two differ.
The truck keeps moving after a dip or a rough patch instead of settling.
The front end drops hard when you slow down.
Cupped or patchy wear can point to worn ride parts.
A knock from a corner of the truck should be inspected.
Any of these deserves a look from a technician. Mention them when you book so the visit is planned around them.
Request parts through the website, book the install online, or call and talk it over. The service department works Monday through Friday, and the parts team is a phone call away for fitment questions.
See the service departmentChoosing Between the Lines
Does Holiday GMC sell GM Genuine Parts?
Yes, the store lists GM Genuine Parts along with ACDelco parts. Ask the parts team which applies to your vehicle.
Are ACDelco parts a good choice for a GMC?
They're one of the two lines the store works with. The right pick depends on the part and the repair, so ask for a recommendation.
Can I ask for a specific line?
You can state a preference when you order. The parts team will tell you what's available for your vehicle.
Ordering and Pickup
How do I order GMC parts in Graham, TX?
Use the Order Parts page on the Holiday GMC site or call (940) 227-4212. Have your model, trim and VIN ready.
What are the parts department hours?
Parts is open Monday from 9:00 AM to 5:45 PM and Tuesday through Friday from 9:00 AM to 5:30 PM. It's closed on Saturday and Sunday.
Is the part in stock when I call?
Availability changes daily. The parts team can confirm and tell you the timing if the part needs to be ordered.
Installation and Service
Can the service department install a part I order?
Book a visit and mention the part. The advisor can explain how the department handles the work.
Who installs parts on a GMC?
GMC Certified Service technicians handle work at the Holiday GMC service department.
Can I get parts for a vehicle that isn't a GMC?
The service department states that it can handle a GMC or any other vehicle. Call the parts team to confirm what they can supply.
Warranty and Records
Where can I read about the parts warranty?
The Parts Warranty page on the Holiday GMC site explains coverage. The parts team can answer questions on a specific item.
Should I keep my repair receipts?
Yes. They show the part, the date and who installed it, which helps if a claim comes up.
Do parts have any effect on my vehicle warranty?
Check your warranty paperwork and ask the advisor. Terms vary, so the written details are what count.
Common Wear Items
How often should I replace wiper blades?
When they smear, chatter or leave streaks. Hot Texas summers can harden rubber faster than you'd expect.
What is the difference between shocks and struts?
They both control bounce, but struts also carry part of the suspension structure. The site has an explainer on the topic.
Does Holiday GMC offer coupons on parts?
The site has a Service and Parts Specials page. Check there, since offers change.