2024 Brinkley Model G

Model G sidewall cracks at the slide opening

Last updated October 15, 2026

Symptoms

Brinkley's wall-crack page says Model G fifth wheels are the line where these cracks have shown up most often, ahead of Model Z. The crack is usually at a bedroom slide corner, and loose trim with an uneven wall on each side of the trim is the early sign they name. Their field rates on that page say Model G incidence fell 59 percent from model year 2024 to 2025, and another 87 percent from 2025 to 2026. This site's Model G year list is 2024, so the later years in those rates are not separate pages here. Work instruction WI-014-2025, revision C, dated July 21, 2025, applies to Brinkley Model G fifth wheels. It says that under certain conditions, minor cracks may form in the sidewalls, typically starting at the lower corners of a slide opening. The document title also names the Z3610. The applies-to line is Model G. On the Brinkley owners forum, in October 2024, a Model G owner posted a crack about 3 inches long under the aft bed slide and asked if it meant frame failure. The thread quotes a Brinkley post, from a Model Z owners group, that names Model G and Model Z, calls the cracks an adhesion issue between the skin and the aluminum tube, describes them as cosmetic, and says they are not frame flex. A reply says a G3950 had the same crack and that Brinkley was responsive. That reply does not state a model year.

Likely causes

The July 2025 work instruction is a repair procedure for cracks at the lower slide corners. It does not give a measured cause. Brinkley's 2026 page says a rigid chassis sends the remaining movement into the sidewall, the bond at the slide corner can loosen, and in some cases welds in the aluminum crack. The page says that is not chassis frame flex, and that the cracks they have seen have not taken away towability or slide function. The 2024 forum quote is the shorter version: adhesion, cosmetic, not frame flex. The posts do not show one missed weld on every Model G.

Common fixes

The work instruction says the correction is to replace the sidewall and add support so a later crack is less likely. It is written for professional technicians, and it says some steps need a team of at least 4 or 5 people. Brinkley's page tells an owner to call Customer Care at 574-501-4280, or to use the contact form, with photos, the VIN, and a phone number. They then offer trained repair locations. The repair they describe opens the skin, inspects welds, adds aluminum supports, and installs a new skin. They say that work is typically about three weeks once it starts. In November 2024 the forum owner wrote that Brinkley had talked about transport to Elkhart and about two weeks of repair plus transport time, and later named Blue Compass in Post Falls as a shop that could do the work. Those times are what that owner was told in 2024. The 2026 page is the later figure. Ask Customer Care which shop is trained for this coach, and ask them to describe the repair before the unit is hauled. The page says not to drill or seal the crack unless they tell you to. The forum owner stop-drilled and sealed the crack while waiting. That is the owner's choice in the thread, not the step on the current page.

DIY difficulty

Not a driveway job in these sources. The work instruction warns that ladders, power tools, and welding are part of the repair, and it says professional technicians have to do it. Brinkley's page says not to modify the crack before they look at photos.

Parts needed

The work instruction names KORAPUR urethane adhesive sealant, part 112154, for the aluminum that will touch the new fiberglass skin. It says that adhesive has a 6-hour initial set and a 24-hour cure. It does not publish a sidewall part number an owner can order.

Warranty notes

This is not a recall. The work instruction is a dealer repair procedure. Brinkley's page says they cover the repair when the crack matches their findings and is caused by a defect, including when photos were sent during the warranty period and the appointment is later. Keep the case number. Owners generally pay transport and lodging. The forum owner was offered a hotel during a factory visit and later a shop in Post Falls. That is one owner's account. It is not a coverage decision for another Model G. Model Z uses the same wall-crack page and has its own report.

Sources

• Brinkley wall-crack page, which says Model G is the most affected fifth wheel
• Brinkley work instruction WI-014-2025 for Model G sidewall replacement
• Brinkley owners forum thread on a Model G sidewall crack under the bed slide